Zoom lens system

ABSTRACT

A zoom lens system comprises, from the object side, a first lens unit having a positive refractive power, a second lens unit having a positive refractive power and a third lens unit having a negative refractive power. During zooming, the sizes of the first area of empty space between the first lens unit and the second lens unit and the second area of empty space between the second lens unit and the third lens unit change.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention pertains to a zoom lens system.

2. Description of the Related Art

Mainstream telephoto-type zoom lens systems that have been conventionally proposed have a four-component construction in which lens units are arranged such that their order in terms of refractive power is, from the object side, positive, negative, positive and positive, or positive, negative, positive and negative. However, a four-component zoom lens system generally has a large number of lenses, and when it is zoomed to the wide angle position, its total length becomes long.

SUMMARY OF THE INVENTION

The present invention was made in consideration of these points. Its object is to provide a compact zoom lens system which comprises a small number of lenses and has a short total system length.

Another object of the present invention is to provide a zoom lens system in which various aberrations are well compensated for despite its compact size.

These and other objects are attained by providing a lens system which comprises a master lens and a converter lens which is attachable at an object side of the master lens. The master lens and the converter lens have a plurality of lens unit which are movable on an optical axis during a zooming operation of the lens system.

BRIEF DESCRIPTION OF THE DRAWINGS

The above objects and features of the present invention are set forth with particularity in the appended claims. The present invention, both as to its organization and manner of operation, together with further objects and advantages thereof, may best be understood by reference to the following detailed description, taken in connection with the accompanying drawings.

FIG. 1 is a cross-sectional view of a first embodiment of the lens system.

FIG. 2a to 2i show aberration curves of the first embodiment of the lens system.

FIG. 3 is a cross-sectional view of a second embodiment of the lens system.

FIG. 4a to 4i show aberration curves of the second embodiment of the lens system.

FIG. 5 is a cross-sectional view of a third embodiment of the lens system.

FIG. 6a to 6i show aberration curves of the third embodiment of the lens system.

FIG. 7a to 7i show aberration curves of the third embodiment of the lens system at the closest focusing condition.

FIG. 8 is a cross-sectional view of a fourth embodiment of the lens system.

FIG. 9a to 9i show aberration curves of the fourth embodiment of the lens system.

FIG. 10 is a cross-sectional view of a fifth embodiment of the lens system.

FIG. 11a to 11i show aberration curves of the fifth embodiment of the lens system.

FIG. 12 is a cross-sectional view of a sixth embodiment of the lens system.

FIG. 13a to 13i show aberration curves of the sixth embodiment of the lens system.

FIG. 14 is a cross-sectional view of a seventh embodiment of the lens system.

FIG. 15a to 15i show aberration curves of the seventh embodiment of the lens system.

FIG. 16 is a cross-sectional view of a eighth embodiment of the lens system.

FIG. 17a to 17i show aberration curves of the eighth embodiment of the lens system.

FIG. 18 is a cross-sectional view of a ninth embodiment of the lens system.

FIG. 19a to 19i show aberration curves of the ninth embodiment of the lens system.

FIG. 20a to 20i show aberration curves of the ninth embodiment of the lens system at the closest focusing condition.

FIG. 21 is a cross-sectional view of a tenth embodiment of the lens system.

FIG. 22a to 22i show aberration curves of the tenth embodiment of the lens system.

FIG. 23 is a cross-sectional view of a eleventh embodiment of the lens system.

FIG. 24a to 24i show aberration curves of the eleventh embodiment of the lens system.

FIG. 25 is a cross-sectional view of a twelfth embodiment of the lens system.

FIG. 26a to 26i show aberration curves of the twelfth embodiment of the lens system.

FIG. 27a to 27i show aberration curves of the twelfth embodiment of the lens system at the closest focusing condition.

FIG. 28 is a cross-sectional view of a thirteenth embodiment of the lens system.

FIG. 29a to 29i show aberration curves of the thirteenth embodiment of the lens system.

FIG. 30 is a cross-sectional view of a fourteenth embodiment of the lens system.

FIG. 31a to 31i show aberration curves of the fourteenth embodiment of the lens system.

FIG. 32 is a cross-sectional view of a fifteenth embodiment of the lens system.

FIG. 33a to 33i show aberration curves of the fifteenth embodiment of the lens system.

FIG. 34 is a cross-sectional view of a sixteenth embodiment of the lens system.

FIG. 35a to 35i show aberration curves of the sixteenth embodiment of the lens system.

FIG. 36 is a cross-sectional view of a seventeenth embodiment of the lens system.

FIG. 37a to 37i show aberration curves of the seventeenth embodiment of the lens system.

FIG. 38 is a cross-sectional view of a eighteenth embodiment of the lens system.

FIG. 39a to 39i show aberration curves of the eighteenth embodiment of the lens system.

FIG. 40 is a cross-sectional view of a nineteenth embodiment of the lens system.

FIG. 41a to 41i show aberration curves of the nineteenth embodiment of the lens system.

FIG. 42a to 42i show aberration curves of the nineteenth embodiment of the lens system at the closest focusing condition.

FIG. 43 is a cross-sectional view of a twentieth embodiment of the lens system.

FIG. 44a to 44i show aberration curves of the twentieth embodiment of the lens system.

FIG. 45a to 45i show aberration curves of the twentieth embodiment of the lens system at the closest focusing condition.

FIG. 46 is a cross-sectional view of a twenty-first embodiment of the lens system.

FIG. 47a to 47i show aberration curves of the twenty-first embodiment of the lens system.

FIG. 48 is a cross-sectional view of a twenty-second embodiment of the lens system.

FIG. 49a to 49i show aberration curves of the twenty-second embodiment of the lens system.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention are explained below.

The embodiments have a three-component construction: they basically comprise, from the object side, a first lens unit having a positive refractive power, a second lens unit having a positive refractive power and a third lens unit having a negative refractive power. During zooming, the sizes of the first area of empty space between the first lens unit and the second lens unit and the second area of empty space between the second lens unit and the third lens unit change.

The zoom lens systems of the embodiments meet the following conditions in addition to having the basic construction described above. It is not necessary, however, to meet all of the conditions simultaneously.

    (1)BFL.sub.W <DL/2

    E.sub.12W /E.sub.23T <20                                   (2)

    0.5<f.sub.1 /f.sub.W <3.0                                  (3)

    0.1<f.sub.1 /f.sub.2 <10                                   (4)

    0.1<f.sub.12W /f.sub.W <5                                  (5)

    1.6<β.sub.3W <3.0                                     (6)

    0.1<φ.sub.1-1 /φW<5.0                              (7)

    -5.0<φ.sub.2-1 /φ.sub.W <-0.01                     (8)

    6<T.sub.1 <12                                              (9)

wherein:

BFL_(W) : a back focal length of the zoom lens system in the shortest focal length condition,

DL : a diagonal length of an image frame,

E_(12W) : a length of the first area of empty space in the shortest focal length condition,

E_(23T) : a length of the second area of empty space in the longest focal length condition,

f₁ : a focal length of the first lens unit,

f₂ : a focal length of the second lens unit,

f_(W) : a focal length of the zoom lens system in the shortest focal length condition,

f_(12W) : a composite focal length with the first and second lens units in the shortest focal length condition,

β_(3W) : a lateral magnification of the third lens unit in the shortest focal length condition,

φ_(W) : a refractive power of the zoom lens system in the shortest focal length condition,

φ₁₋₁ : a refractive power of a lens surface of the fist lens unit that is closest to the object side,

φ₂₋₁ : a refractive power of a lens surface of the second lens unit that is closest to the object side, and

T₁ : an axial distance of the first lens unit.

Condition (1) governs the back focal length of the zoom lens system in the shortest focal length condition.

Most conventional zoom lens systems that have a refractive power arrangement of positive, positive and negative from the object side have a short back focal length. Their back focal length in the wide angle range is particularly short. A zoom lens system with a short back focal length is best suited for devices whose distance from the last lens surface to the image plane is short, such as compact cameras, but it is not suitable for devices in which a mirror is used between the last lens surface and the image plane, such as single lens reflex cameras.

With this in mind, in the embodiments pertaining to the present invention, an adequate back focal length in the wide angle range can be obtained by meeting condition (1), and they can therefore be used in devices that require a long back focal length, such as single lens reflex cameras.

Condition (2) governs the ratio of the length of the first area of empty space in the shortest focal length condition to the second area of empty space in the longest focal length condition. If the lower limit of condition (2) is exceeded with the first area of empty space in the wide angle range becoming small, the point in the second lens unit at which the light beam enters said lens unit rises relative to the center point of the lens. Consequently, it becomes difficult to compensate for the negative axial chromatic aberration that occurs in the second lens unit. If the lower limit of condition (2) is exceeded by the second area of empty space in the telephoto range becoming small, the point in the third lens unit at which the light beam enters said lens unit rises relative to the center point of the lens. Consequently, it becomes difficult to compensate for the positive axial chromatic aberration that occurs in the third lens unit, and at the same time the spherical aberration tends to worsen. On the other hand, if the upper limit of condition (2) is exceeded with the second area of empty space in the telephoto range becoming large or with the first area of empty space in the wide angle range becoming large, the total length of the zoom lens system increases, and at the same time the second area of empty space in the wide angle range also increases, which makes it difficult to obtain an adequate back focal length.

It is effective to set the lower limit of condition (2) at around 6 in order to better compensate for the axial chromatic aberration.

Condition (3) governs the ratio of the focal length of the first lens unit to the focal length of the zoom lens system in the shortest focal length condition. If the lower limit of condition (3) is exceeded, the refractive power of the first lens unit becomes too strong, and as a result it becomes difficult to obtain an adequate back focal length in the wide angle range, as well as to compensate for the positive lateral chromatic aberration in the telephoto range. On the other hand, if the upper limit of condition (3) is exceeded, the refractive power of the first lens unit becomes too weak, and as a result it becomes difficult to compensate for the negative axial chromatic aberration in the wide angle range and the positive axial chromatic aberration in the telephoto range. Further, since the amount of movement of the first lens unit during zooming increases, a lens system that exceeds the upper limit of condition (3) is unsuitable in achieving a compact lens mount.

Condition (4) governs the ratio of the focal length of the first lens unit to the focal length of the second lens unit. If the lower limit of condition (4) is exceeded, the refractive power of the first lens unit becomes too strong, and as a result it becomes difficult to compensate for the spherical aberration in the telephoto range. On the other hand, if the upper limit of condition (4) is exceeded, the refractive power of the second lens unit becomes too strong, and as a result it becomes difficult to compensate for the distortion and off-axial coma in the wide angle range. In addition, the refractive power of the first lens unit becomes too weak and the amount of movement of the first lens unit during zooming increases, and as a result it becomes difficult to achieve a compact lens mount.

It is effective to set the upper limit of condition (4) at around 2.2 in order to better compensate for the aberrations in the wide angle range and achieve a more compact lens mount.

Condition (5) governs the ratio of the composite focal length of the first and second lens units in the shortest focal length condition to the focal length of the zoom lens system in the shortest focal length condition. If the lower limit of condition (5) is exceeded, the refractive powers of the first and second lens units both become too strong, and as a result it becomes difficult to compensate for the spherical aberration in the telephoto range and the off-axial aberrations in the wide angle range. If the upper limit of condition (5) is exceeded, the refractive powers of the first and second lens units both become too weak, and as a result the compactness of the zoom lens system is lost.

Condition (6) governs the lateral magnification of the third lens unit in the shortest focal length condition. If the lower limit of condition (6) is exceeded, the refractive power of the third lens unit becomes too strong, and as a result it becomes difficult to compensate for aberrations--the curvature of field and coma, in particular--in the third lens unit. On the other hand, if the upper limit of condition (6) is exceeded, the refractive power of the third lens unit becomes too weak, and as a result the compactness of the zoom lens system is lost.

Condition (7) governs the ratio of the refractive power of the lens surface of the first lens unit that is closest to the object to the refractive power of the entire zoom lens system in the shortest focal length condition.

Generally, in a telephoto-type zoom lens system, the point in the first lens unit at which the beam of light passes through said lens unit becomes highest in the telephoto range. Where the light beam passes through a lens unit at a point that is high relative to the center of the lens unit, compensation for aberrations is difficult. Therefore, in order to obtain good performance in terms of compensation for aberrations in the telephoto range, it is preferred that the point in the first lens unit at which the light beam passes through said lens unit be as low as possible. This construction can be realized by having the lens surface of the first lens unit that is closest to the object (the first surface) be convex on the object side such that it has a positive refractive power. Condition (7) is a condition to set the refractive power of this first surface to an appropriate level.

If the lower limit of condition (7) is exceeded, the refractive power of the first surface becomes too weak, and as a result the first lens unit becomes large, making it difficult to achieve a compact zoom lens system. In addition, it becomes necessary to enhance the refractive powers of other positive surfaces in the first lens unit, which makes it difficult to compensate for spherical aberrations and comas in the telephoto range in particular. On the other hand, if the upper limit of condition (7) is exceeded, the refractive power of the first surface becomes too strong, which gives rise to the occurrence of large spherical and comas in the telephoto range, compensation for which is difficult.

Condition (8) governs the ratio of the refractive power of the lens surface of the second lens unit that is closest to the object to the refractive power of the entire zoom lens system in the shortest focal length condition.

Where the first lens unit has a positive refractive power and the third lens unit has a negative refractive power, a positive distortion easily occurs. It is preferred to give the surface of the second lens unit that is closest to the object (the second surface) a strong refractive power in order to compensate for said distortion. However, if the second surface is made to have a strong positive refractive power, a large coma easily occurs from the second surface. This phenomenon occurs because the light beam projected from the first lens unit enters the second lens unit from a wide angle when a relatively strong refractive power is given to the first lens unit in order to achieve a compact zoom lens system. Therefore, it is preferred to give a negative refractive power to the second surface. By giving a strong negative refractive power to the second surface, the rear principal point of the second lens unit becomes positioned on the image side. Therefore, it becomes possible to reduce the first area of empty space, which also contributes to making the zoom lens system compact. Condition (8) is a condition to set the refractive power of this second surface to an appropriate level.

If the lower limit of condition (8) is exceeded, the refractive power of the second surface becomes too strong, and as a result overcompensation of the distortion in the minus direction easily takes place. In addition, it becomes necessary to use a surface having a strong positive refractive power within the second lens unit in order to have the second lens unit have a positive refractive power, which allows for easy occurrence of a coma. On the other hand, if the upper limit of condition (8) is exceeded, the refractive power of the first surface becomes too weak, which makes it difficult to compensate for distortion, in addition to making it difficult to achieve a compact zoom lens system.

It is effective to set the lower limit of condition (8) at around -3.0 in order to better compensate for said distortion.

Condition (9) governs the axial distance of the first lens unit. If the lower limit of condition (9) is exceeded, it becomes difficult to obtain a proper edge surface for the lens(es) of the first lens unit having a positive refractive power. If the upper limit of condition (9) is exceeded, the length of the first lens unit becomes too long, which makes it difficult to achieve a compact zoom lens system.

In addition, it is preferred to use aspherical surfaces in the zoom lens systems of the embodiments. Naturally, however, aspherical surfaces need not necessarily be used.

Where an aspherical surface is used in the first lens unit, the following effect is achieved. In other words, in order to make the zoom lens system compact and reduce the amount of movement of the first lens unit during zooming from the position in the shortest focal length condition to the position in the longest focal length condition, it is necessary to make the refractive power of the first lens unit strong. Where the refractive power of the first lens unit is made strong, however, a spherical aberration (spherical aberration in the telephoto range, in particular) easily occurs. The aspherical surface in the first lens unit is effective in compensating for this spherical aberration.

Furthermore, where the surface of the first lens unit that is closest to the object is given a negative refractive power so that an adequate back focal length may be obtained in the wide angle range, if the negative refractive power given to this surface is strong, a positive spherical aberration and a positive axial chromatic aberration easily occur. Therefore, if this surface is made aspherical, which weakens the negative refractive power, these aberrations are kept small while an adequate back focal length in the wide angle range can be effectively obtained.

Where an aspherical surface is used in the second lens unit, the following effect is achieved. In other words, in order to make the zoom lens system compact, it is necessary to make the refractive power of the second lens unit strong. Where the refractive power of the second lens unit is made strong, however, an off-axial coma easily occurs in the wide angle range. The aspherical surface in the second lens unit is effective to compensate for this off-axial coma.

Furthermore, if it is attempted to construct the second lens unit using a small number of lenses, it becomes necessary to give the surface of the second lens unit that is closest to the image a strong positive refractive power, and as a result the spherical aberration coefficient easily becomes a large positive value. Therefore, if a negative surface having a relatively weak refractive power is made aspherical, a large negative value can be obtained using this aspherical surface, which is effective in offsetting said spherical aberration in the second lens unit.

Where an aspherical surface is used in the third lens unit, the following effect is achieved. In other words, if the refractive powers of the first and second lens units are made strong in order to make the zoom lens system compact, it inevitably also becomes necessary to increase the refractive power of the third lens unit. If the refractive power of the third lens unit is increased, however, the refractive powers of negative surfaces become strong, which easily gives rise to a negative curvature of field. This inclination is particularly marked in zoom lens systems having a long back focal length. The aspherical surface in the third lens unit is effective in compensating for this curvature of field.

Furthermore, if it is attempted to construct the third lens unit using a small number of lenses, it becomes necessary to use a surface having a strong negative refractive power in the third lens unit, and as a result the spherical aberration coefficient easily becomes a large negative value. Therefore, a large positive spherical aberration coefficient can be obtained by using an aspherical surface in the third lens unit, which effectively offsets the spherical aberration in the third lens unit.

By using three or more aspherical surfaces in the entire zoom lens system, it becomes possible to significantly reduce the number of lenses that comprise each lens unit. For example, it is possible to construct each lens unit with two lenses. In this case, it is effective to use an aspherical surface in the second and third lens units.

In addition, it is preferred that the first and third lens units be moved together during zooming. By moving the first and third lens units together during zooming, the lens mount construction--the cam construction for zooming, in particular--can be simplified.

The aperture is preferably positioned between the first lens unit and the second lens unit, or between the second lens unit and the third lens unit. Where the aperture is positioned between the first lens unit and the second lens unit, it becomes possible to cut off-axial lower light rays in the wide angle range in particular, so that the performance is improved, and at the same time it becomes possible to reduce the lens diameter of the first lens unit. Where the aperture is positioned between the second lens unit and the third lens unit, the matching between the aperture and off-axial light rays improves so that it becomes possible to secure a good illumination curve with regard to the image height even when the aperture is made small. The aperture may be moved together with the second lens unit or independently of the second lens unit during zooming.

Focusing is preferably performed using the second lens unit. The effect of focusing using the second lens unit is explained below using aberration coefficients. Table 1 shows the aberration coefficients in Embodiment 3, which is described below, where focusing is performed using the first lens unit, the second lens unit and the third lens unit.

                  TABLE 1                                                          ______________________________________                                                   Infinity                                                                              Nearest Focusing                                                        Focusing                                                                              Unit 1    Unit 2  Unit 3                                      ______________________________________                                         Spherical                                                                              Wide    3.1      6.5     3.6   3.3                                     Aberration                                                                             Tele    81       130     85    32                                      Coma    Wide    0.7      -1.3    0.5   0.2                                             Tele    0.1      -13     -0.7  -0.5                                    Astigmatism                                                                            Wide    0.4      0.1     0.1   0.1                                             Tele    0.1      3.0     -0.2  0.1                                     ______________________________________                                    

The following can be seen from Table 1. First, where focusing is performed using the first lens unit, compensation for the spherical aberration, coma and astigmatism tends to be insufficient. Where focusing is performed using the third lens unit, the fluctuation in spherical aberration tends to be large between infinity focusing and closest range focusing. Where focusing is performed using the second lens unit, all aberrations are well compensated for and no significant fluctuation in any aberration is seen between infinity focusing and closest range focusing.

Further, since the refractive power of the first lens unit is not very strong, where focusing is performed using the first lens unit, the lens unit must be moved over a great distance to perform focusing. Where focusing is performed using the third lens unit, the third lens unit moves toward the image during focusing, which shortens the back focal length. This is therefore not suited for devices such as single reflex cameras, in particular, which require a long back focal length. Where focusing is performed using the second lens unit, there is little disadvantage arising in connection with the lens unit's movement for focusing. Therefore, it is preferred that focusing be performed using the second lens unit.

Specific numerical data for each embodiment is shown below. The specific construction of each embodiment is as shown in FIGS. 1 through 22 and Tables 2 through 23. In each table, ri (i=1, 2, 3, . . . ) represents the radius of curvature of the ith lens surface from the object side; di (i=1, 2, 3, . . . ) represents the ith axial distance from the object side; and Ni (i=1, 2, 3, . . . ) and νvi (i=1, 2, 3, . . . ) represent the refractive index (νd) and the Abbe number (νd) with regard to the d-line of the ith lens from the object side, respectively. Values of focal length f and f-number fNo of the zoom lens system in the shortest focal length condition, the middle focal length condition and the longest focal length condition are also shown in the tables.

In the embodiments, the surfaces marked with asterisks in the radius of curvature column are aspherical. The configuration of an aspherical surface is defined by the following equation. ##EQU1## wherein: X : an amount of displacement from the reference surface along the optical axis,

Y : a height in a direction perpendicular to the optical axis,

C : a paraxial curvature,

ε: a conic constant, and

Ai : an ith aspherical coefficient.

                                      TABLE 2A                                     __________________________________________________________________________     Lens Construction of First Embodiment                                          f = 102.0 ˜ 140.0 ˜ 195.0                                          fNo. = 4.6 ˜ 5.8 ˜ 5.8                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________        r1 -169.365                                                                             d1   2.000                                                                              N1 1.74000                                                                              ν1                                                                             28.26                                            r2 -1306.472                                                                            d2   0.971                                                            r3 45.676                                                                               d3   5.000                                                                              N2 1.48749                                                                              ν2                                                                             70.44                                            r4 -1437.442                                                                            d4  14.039 ˜ 24.553 ˜ 33.196                           *  r5 28.504                                                                               d5   5.000                                                                              N3 1.71736                                                                              ν3                                                                             29.42                                         *  r6 21.194                                                                               d6   4.934                                                            r7 -113.038                                                                             d7   9.798                                                                              N4 1.48749                                                                              ν4                                                                             70.44                                            r8 -22.848                                                                              d8   1.000 ˜ 1.000 ˜ 1.000                                r9 Stop                                                                                 d9  22.688 ˜ 12.138 ˜ 3.200                            *  r10                                                                               -32.993                                                                              d10  3.000                                                                              N5 1.75520                                                                              ν5                                                                             27.51                                         *  r11                                                                               -24.878                                                                              d11  2.500                                                            r12                                                                               -23.411                                                                              d12  1.000                                                                              N6 1.72000                                                                              ν6                                                                             50.31                                            r13                                                                               -131.625                                                                 __________________________________________________________________________      Σd = 71.930 ˜ 71.894 ˜ 71.599                          

                  TABLE 2B                                                         ______________________________________                                         Aspherical Coefficient of First Embodiment                                     ______________________________________                                         r5:                        r10:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.26445 × 10.sup.-4                                                                          A3 =  -0.81495 × 10.sup.-4                    A6 =  -0.10097 × 10.sup.-6                                                                          A4 =  0.27205 × 10.sup.-4                     A8 =  0.35240 × 10.sup.-9                                                                           A5 =  -0.28129 × 10.sup.-5                    A10 = -0.41137 × 10.sup.-11                                                                         A6 =  0.13213 × 10.sup.-6                     A12 = 0.12761 × 10.sup.-13                                                                          A7 =  -0.62289 × 10.sup.-10                   r6:                        A8 =  -0.62048 × 10.sup.-9                    ε =                                                                          0.10000 × 10   A9 =  -0.16606 × 10.sup.-11                   A4 =  -0.27677 × 10.sup.-4                                                                          A10 = -0.15232 × 10.sup.-11                   A6 =  -0.12567 × 10.sup.-6                                                                          A11 = 0.77273 × 10.sup.-14                    A8 =  0.28046 × 10.sup.-9                                                                           A12 = 0.98806 × 10.sup.-14                    A10 = -0.48853 × 10.sup.-11                                                                         A13 = 0.14722 × 10.sup.-18                    A12 = 0.22406 × 10.sup.-13                                                                          A14 = 0.78203 × 10.sup.-19                    A14 = 0.80357 × 10.sup.-19                                                                          A15 = 0.61697 × 10.sup.-20                    A16 = 0.17989 × 10.sup.-20                                                                          A16 = 0.35458 × 10.sup.-21                                     r11:                                                                           ε =                                                                           0.100 × 10                                                        A3 =   -0.732 × 10.sup.-4                                                A4 =   0.167 × 10.sup.-4                                                 A5 =   -0.990 × 10.sup.-6                                                A6 =   -0.153 × 10.sup.-7                                                A7 =   0.481 × 10.sup.-9                                                 A8 =   -0.233 × 10.sup.-9                                                A9 =   -0.173 × 10.sup.-10                                               A10 =  0.743 × 10.sup.-12                                                A11 =  0.299 × 10.sup.-13                                                A12 =  -0.586 × 10.sup.-16                                               A13 =  -0.383 × 10.sup.-18                              ______________________________________                                    

                                      TABLE 3A                                     __________________________________________________________________________     Lens Construction of Second Embodiment                                         f = 102.0 ˜ 140.0 ˜ 195.0                                          fNo. = 4.6 ˜ 5.8 ˜ 5.8                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________     *  r1 -34.837                                                                              d1   2.000                                                                              N1 1.74000                                                                              ν1                                                                             28.26                                            r2 -43.462                                                                              d2   0.971                                                            r3 54.296                                                                               d3   5.000                                                                              N2 1.48749                                                                              ν2                                                                             70.44                                            r4 -263.350                                                                             d4  13.910 ˜ 26.089 ˜ 35.789                           *  r5 27.536                                                                               d5   5.000                                                                              N3 1.71736                                                                              ν3                                                                             29.42                                         *  r6 20.556                                                                               d6   4.934                                                            r7 -494.824                                                                             d7   9.798                                                                              N4 1.48749                                                                              ν4                                                                             70.44                                            r8 -26.145                                                                              d8   1.000 ˜ 1.000 ˜ 1.000                                r9 Stop                                                                                 d9  22.457 ˜ 12.083 ˜ 3.200                            *  r10                                                                               -26.328                                                                              d10  3.000                                                                              N5 1.84666                                                                              ν5                                                                             23.82                                         *  r11                                                                               -25.666                                                                              d11  2.500                                                            r12                                                                               -28.697                                                                              d12  1.000                                                                              N6 1.61800                                                                              ν6                                                                             63.39                                            r13                                                                               -220.191                                                                 __________________________________________________________________________      Σd = 71.570 ˜ 73.375 ˜ 74.192                          

                  TABLE 3B                                                         ______________________________________                                         Aspherical Coefficient of Second Embodiment                                    ______________________________________                                         r1:                        r10:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  0.13697 × 10.sup.-5                                                                           A3 =  -0.86906 × 10.sup.-4                    A6 =  -0.83104 × 10.sup.-10                                                                         A4 =  0.25404 × 10.sup.-4                     A8 =  0.15066 × 10.sup.-11                                                                          A5 =  -0.28828 × 10.sup.-5                    r5:                        A6 =  0.13116 × 10.sup.-6                     ε =                                                                          0.10000 × 10   A7 =  0.11429 × 10.sup.-8                     A4 =  -0.27994 × 10.sup.-4                                                                          A8 =  -0.43197 × 10.sup.-9                    A6 =  -0.96492 × 10.sup.-7                                                                          A9 =  -0.16606 × 10.sup.-11                   A8 =  0.43136 × 10.sup.-9                                                                           A10 = 0.32991 × 10.sup.-12                    A10 = -0.30280 × 10.sup.-11                                                                         A11 = 0.77273 × 10.sup.-14                    A12 = 0.70736 × 10.sup.-14                                                                          A12 = 0.45988 × 10.sup.-14                    r6:                        A13 = 0.14722 × 10.sup.-18                    ε =                                                                          0.10000 × 10   A14 = 0.78203 × 10.sup.-19                    A4 =  -0.33938 × 10.sup.-4                                                                          A15 = 0.61697 × 10.sup.-20                    A6 =  -0.12393 × 10.sup.-6                                                                          A16 = 0.35458 × 10.sup.-21                    A8 =  0.43751 × 10.sup.-9                                                                           r11:                                                A10 = -0.36780 × 10.sup.-11                                                                         ε =                                                                          0.10000 × 10                            A12 = 0.11085 × 10.sup.-13                                                                          A3 =  -0.65190 × 10.sup.-4                    A14 = 0.80357 × 10.sup.-19                                                                          A4 =  0.13693 × 10.sup.-4                     A16 = 0.17989 × 10.sup.-20                                                                          A5 =  -0.10867 × 10.sup.-5                                     A6 =  -0.12995 × 10.sup.-7                                               A7 =  0.77090 × 10.sup.-9                                                A8 =  0.15613 × 10.sup.-9                                                A9 =  -0.82346 × 10.sup.-11                                              A10 = -0.16902 × 10.sup.-12                                              A11 = 0.29893 × 10.sup.-13                                               A12 = 0.35220 × 10.sup.-15                                               A13 = -0.38277 × 10.sup.-18                             ______________________________________                                    

                                      TABLF 4A                                     __________________________________________________________________________     Lens Construction of Third Embodiment                                          f = 102.0 ˜ 140.0 ˜ 195.0                                          fNo. =4.6 ˜ 5.8 ˜ 5.8                                              Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________        r1 -180.196                                                                             d1   2.000                                                                              N1 1.74000                                                                              ν1                                                                             28.26                                            r2 -2424.653                                                                            d2   0.971                                                            r3 45.563                                                                               d3   5.000                                                                              N2 1.48749                                                                              ν2                                                                             70.44                                            r4 -1544.616                                                                            d4  14.038 ˜ 24.559 ˜ 33.206                           *  r5 28.165                                                                               d5   5.000                                                                              N3 1.71736                                                                              ν3                                                                             29.42                                         *  r6 20.971                                                                               d6   4.934                                                            r7 -111.559                                                                             d7   9.779                                                                              N4 1.48749                                                                              ν4                                                                             70.44                                            r8 -22.776                                                                              d8   1.000 ˜ 1.000 ˜ 1.000                                r9 Stop                                                                                 d9  22.685 ˜ 12.137 ˜ 3.200                            *  r10                                                                               -32.151                                                                              d10  3.000                                                                              N5 1.75520                                                                              ν5                                                                             27.51                                         *  r11                                                                               -24.537                                                                              d11  2.500                                                            r12                                                                               -23.781                                                                              d12  1.000                                                                              N6 1.72000                                                                              ν6                                                                             50.31                                            r13                                                                               -139.601                                                                 __________________________________________________________________________     Σd = 71.907 ˜ 71.88 ˜ 71.59                                           Closest Focusing (D = 1.5 m)                                                      d4  10.556 ˜ 20.502 ˜ 28.512                                       d8  4.482 ˜ 5.057 ˜ 5.694                                          d9  22.685 ˜ 12.137 ˜ 3.200                       

                  TABLE 4B                                                         ______________________________________                                         Aspherical Coefficient of Third Embodiment                                     ______________________________________                                         r5:                        r10:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.26619 × 10.sup.-4                                                                          A3 =  -0.80386 × 10.sup.-4                    A6 =  -0.10232 × 10.sup.-6                                                                          A4 =  0.26488 × 10.sup.-4                     A8 =  0.33201 × 10.sup.-9                                                                           A5 =  -0.28564 × 10.sup.-5                    A10 = -0.39994 × 10.sup.-11                                                                         A6 =  0.13032 × 10.sup.-6                     A12 = 0.12569 × 10.sup.-13                                                                          A7 =  -0.15229 × 10.sup.-9                    r6:                        A8 =  -0.63617 × 10.sup.-9                    ε =                                                                          0.10000 × 10   A9 =  -0.16606 × 10.sup.-11                   A4 =  -0.27935 × 10.sup.-4                                                                          A10 = -0.18394 × 10.sup.-11                   A6 =  -0.13216 × 10.sup.-6                                                                          A11 = 0.77273 × 10.sup.-14                    A8 =  0.29134 × 10.sup.-9                                                                           A12 = 0.11590 × 10.sup.-13                    A10 = -0.49551 × 10.sup.-11                                                                         A13 = 0.14722 × 10.sup.-18                    A12 = 0.22885 × 10.sup.-13                                                                          A14 = 0.78203 × 10.sup.-19                    A14 = 0.80357 × 10.sup.-19                                                                          A15 = 0.61697 × 10.sup.-20                    A16 = 0.17989 × 10.sup.-20                                                                          A16 = 0.35458 × 10.sup.-21                                     r11:                                                                           ε =                                                                          0.10000 × 10                                                       A3 =  -0.72161 × 10.sup.-4                                               A4 =  0.16403 × 10.sup.-4                                                A5 =  -0.10134 × 10.sup.-5                                               A6 =  -0.16807 × 10.sup.-7                                               A7 =  0.42257 × 10.sup.-9                                                A8 =  -0.32178 × 10.sup.-9                                               A9 =  -0.81465 × 10.sup.-12                                              A10 = -0.45572 × 10.sup.-12                                              A11 = 0.29893 × 10.sup.-13                                               A12 = 0.22254 × 10.sup.-14                                               A13 = -0.38277 × 10.sup.-18                             ______________________________________                                    

                                      TABLE 5A                                     __________________________________________________________________________     Lens Construction of Fourth Embodiment                                         f = 102.0 ˜ 140.0 ˜ 195.0                                          fNo. = 4.6 ˜ 5.8 ˜ 5.8                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________        r1 -169.365                                                                             d1   2.000                                                                              N1 1.74000                                                                              ν1                                                                             28.26                                            r2 -1306.472                                                                            d2   0.971                                                            r3 45.676                                                                               d3   5.000                                                                              N2 1.48749                                                                              ν2                                                                             70.44                                            r4 -1437.442                                                                            d4  13.039 ˜ 23.553 ˜ 32.196                              r5 Stop                                                                                 d5   1.000                                                         *  r6 28.504                                                                               d6   5.000                                                                              N3 1.71736                                                                              ν3                                                                             29.42                                         *  r7 21.194                                                                               d7   4.934                                                            r8 -113.038                                                                             d8   9.798                                                                              N4 1.48749                                                                              ν4                                                                             70.44                                            r9 -22.848                                                                              d9  23.688 ˜ 13.138 ˜ 4.200                            *  r10                                                                               -32.993                                                                              d10  3.000                                                                              N5 1.75520                                                                              ν5                                                                             27.51                                         *  r11                                                                               -24.878                                                                              d11  2.500                                                            r12                                                                               -23.411                                                                              d12  1.000                                                                              N6 1.72000                                                                              ν6                                                                             50.31                                            r13                                                                               -131.625                                                                 __________________________________________________________________________      Σd = 71.930 ˜ 71.894 ˜ 71.599                          

                  TABLE 5B                                                         ______________________________________                                         Aspherical Coefficient of Fourth Embodiment                                    ______________________________________                                         r6:                        r10:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.26445 × 10.sup.-4                                                                          A3 =  -0.81495 × 10.sup.-4                    A6 =  -0.10097 × 10.sup.-6                                                                          A4 =  0.27205 × 10.sup.-4                     A8 =  0.35240 × 10.sup.-9                                                                           A5 =  -0.28129 × 10.sup.-5                    A10 = -0.41137 × 10.sup.-11                                                                         A6 =  0.13213 × 10.sup.-6                     A12 = 0.12761 × 10.sup.-13                                                                          A7 =  -0.62289 × 10.sup.-10                   r7:                        A8 =  -0.62048 × 10.sup.-9                    ε =                                                                          0.10000 × 10   A9 =  -0.16606 × 10.sup.-11                   A4 =  -0.27677 × 10.sup.-4                                                                          A10 = -0.15232 × 10.sup.-11                   A6 =  -0.12567 × 10.sup.-6                                                                          A11 = 0.77273 × 10.sup.-14                    A8 =  0.28046 × 10.sup.-9                                                                           A12 = 0.98806 × 10.sup.-14                    A10 = -0.48853 × 10.sup.-11                                                                         A13 = 0.14722 × 10.sup.-18                    A12 = 0.22406 × 10.sup.-13                                                                          A14 = 0.78203 × 10.sup.-19                    A14 = 0.80357 × 10.sup.-19                                                                          A15 = 0.61697 × 10.sup.-20                    A16 = 0.17989 × 10.sup.-20                                                                          A16 = 0.35458 × 10.sup.-21                                     r11:                                                                           ε =                                                                          0.10000 × 10                                                       A3 =  -0.73220 × 10.sup.-4                                               A4 =  0.16653 × 10.sup.-4                                                A5 =  -0.98986 × 10.sup.-6                                               A6 =  -0.15299 × 10.sup.-7                                               A7 =  0.48059 × 10.sup.-9                                                A8 =  -0.23320 × 10.sup.-9                                               A9 =  -0.17321 × 10.sup.-10                                              A10 = 0.74297 × 10.sup.-12                                               A11 = 0.29893 × 10.sup.-13                                               A12 = -0.58614 × 10.sup.-16                                              A13 = -0.38277 × 10.sup.-18                             ______________________________________                                    

                                      TABLE 6A                                     __________________________________________________________________________     Lens Construction of Fifth Embodiment                                          f = 102.0 ˜ 140.0 ˜ 195.0                                          fNo. = 4.6 ˜ 5.8 ˜ 5.8                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________        r1 -399.243                                                                             d1   2.000                                                                              N1 1.74000                                                                              ν1                                                                             28.26                                            r2 380.981                                                                              d2   0.830                                                            r3 44.781                                                                               d3   5.000                                                                              N2 1.48749                                                                              ν2                                                                             70.44                                            r4 -3060.443                                                                            d4  13.990 ˜ 24.891 ˜ 33.709                           *  r5 29.970                                                                               d5   5.000                                                                              N3 1.71736                                                                              ν3                                                                             29.42                                         *  r6 20.178                                                                               d6   4.934                                                            r7 -122.681                                                                             d7  10.345                                                                              N4 1.48749                                                                              ν4                                                                             70.44                                            r8 -22.846                                                                              d8   1.000 ˜ 1.000 ˜ 1.000                                r9 Stop                                                                                 d9  22.508 ˜ 12.074 ˜ 3.200                               r10                                                                               -32.592                                                                              d10  3.000                                                                              N5 1.75520                                                                              ν5                                                                             27.51                                            r11                                                                               -24.059                                                                              d11  1.571                                                            r12                                                                               -25.050                                                                              d12  1.000                                                                              N6 1.72000                                                                              ν6                                                                             50.31                                            r13                                                                               -249.468                                                                 __________________________________________________________________________      Σd = 71.178 ˜ 71.645 ˜ 71.589                          

                  TABLE 6B                                                         ______________________________________                                         Aspherical Coefficient of Fifth Embodiment                                     ______________________________________                                         r5:                        r6:                                                 ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.26718 × 10.sup.-4                                                                          A4 =  -0.28960 × 10.sup.-4                    A6 =  -0.10520 × 10.sup.-6                                                                          A6 =  -0.17707 × 10.sup.-6                    A8 =  -0.36923 × 10.sup.-11                                                                         A8 =  0.47075 × 10.sup.-9                     A10 = -0.23644 × 10.sup.-12                                                                         A10 = -0.30757 × 10.sup.-11                   A12 = 0.16385 × 10.sup.-14                                                                          A12 = 0.12678 × 10.sup.-13                                               A14 = 0.80357 × 10.sup.-19                                               A16 = 0.17989 × 10.sup.-20                    ______________________________________                                    

                                      TABLE 7A                                     __________________________________________________________________________     Lens Construction of Sixth Embodiment                                          f = 82.0 ˜ 120.0 ˜ 158.0                                           fNo. = 4.6 ˜ 5.2 ˜ 5.7                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________        r1 24.096                                                                               d1   5.520                                                                              N1 1.71300                                                                              ν1                                                                             53.93                                            r2 -163.557                                                                             d2   0.980                                                            r3 -145.873                                                                             d3   1.920                                                                              N2 1.80741                                                                              ν2                                                                             31.59                                            r4 47.389                                                                               d4   8.695 ˜ 15.630 ˜ 19.294                              r5 Stop                                                                                 d5   0.800                                                         *  r6 -58.697                                                                              d6   1.000                                                                              N3 1.85000                                                                              ν3                                                                             40.04                                            r7 190.384                                                                              d7   5.320                                                            r8 1027.485                                                                             d8   3.020                                                                              N4 1.51680                                                                              ν4                                                                             64.20                                            r9 -16.363                                                                              d9  12.665 ˜ 5.328 ˜ 1.000                             *  r10                                                                               -52.240                                                                              d10  1.840                                                                              N5 1.79850                                                                              ν5                                                                             22.60                                            r11                                                                               -18.355                                                                              d11  0.450                                                            r12                                                                               -14.891                                                                              d12  0.750                                                                              N6 1.80500                                                                              ν6                                                                             40.97                                         *  r13                                                                               160.189                                                                  __________________________________________________________________________      Σd = 42.960 ˜ 42.558 ˜ 41.894                          

                  TABLE 7B                                                         ______________________________________                                         Aspherical Coefficient of Sixth Embodiment                                     ______________________________________                                         r6:                        r13:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.44116 × 10.sup.-4                                                                          A4 =  -0.44116 × 10.sup.-4                    A6 =  0.23475 × 10.sup.-6                                                                           A6 =  0.23475 × 10.sup.-6                     A8 =  -0.10883 × 10.sup.-7                                                                          A8 =  -0.10883 × 10.sup.-7                    A10 = 0.15315 × 10.sup.-9                                                                           A10 = 0.15315 × 10.sup.-9                     A12 = -0.85233 × 10.sup.-12                                                                         A12 = -0.85233 × 10.sup.-11                   A14 = 0.78185 × 10.sup.-17                                                                          A14 = 0.78185 × 10.sup.-15                    A16 = 0.11566 × 10.sup.-18                                                                          A16 = 0.11566 × 10.sup.-17                    r10:                                                                           ε =                                                                          0.10000 × 10                                                       A4 =  -0.32730 × 10.sup.-4                                               A6 =  0.28940 × 10.sup.-6                                                A8 =  0.45843 × 10.sup.-8                                                A10 = -0.71081 × 10.sup.-10                                              A12 = 0.86070 × 10.sup.-12                                               A14 = 0.12445 × 10.sup.-15                                               A16 = 0.22007 × 10.sup.-17                                               ______________________________________                                    

                                      TABLE 8A                                     __________________________________________________________________________     Lens Construction of Seventh Embodiment                                        f = 82.0 ˜ 120.0 ˜ 158.0                                           fNo. = 4.6 ˜ 5.2 ˜ 5.7                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________        r1 24.101                                                                               d1   5.520                                                                              N1 1.71300                                                                              ν1                                                                             53.93                                            r2 -164.342                                                                             d2   0.980                                                            r3 -146.567                                                                             d3   1.920                                                                              N2 1.80741                                                                              ν2                                                                             31.59                                            r4 47.397                                                                               d4   8.254 ˜ 15.381 ˜ 19.231                              r5 Stop                                                                                 d5   0.800                                                         *  r6 -58.620                                                                              d6   1.000                                                                              N3 1.85000                                                                              ν3                                                                             40.04                                         *  r7 170.198                                                                              d7   5.320                                                            r8 1741.917                                                                             d8   3.020                                                                              N4 1.51680                                                                              ν4                                                                             64.20                                            r9 -16.363                                                                              d9  13.283 ˜ 5.579 ˜ 1.000                             *  r10                                                                               -52.846                                                                              d10  1.840                                                                              N5 1.79850                                                                              ν5                                                                             22.60                                            r11                                                                               -18.357                                                                              d11 0.450                                                             r12                                                                               -14.861                                                                              d12 0.750                                                                               N6 1.80500                                                                              ν6                                                                             40.97                                         *  r13                                                                               193.602                                                                  __________________________________________________________________________      Σd = 43.137 ˜ 42.56 ˜ 41.831                           

                  TABLE 8B                                                         ______________________________________                                         Aspherical Coefficient of Seventh Embodiment                                   ______________________________________                                         r6:                        r10:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.43351 × 10.sup.-4                                                                          A4 =  -0.33110 × 10.sup.-4                    A6 =  0.23167 × 10.sup.-6                                                                           A6 =  0.29430 × 10.sup.-6                     A8 =  -0.10817 × 10.sup.-7                                                                          A8 =  0.46163 × 10.sup.-8                     A10 = 0.15377 × 10.sup.-9                                                                           A10 = -0.70917 × 10.sup.-10                   A12 = -0.84872 × 10.sup.-12                                                                         A12 = 0.86252 × 10.sup.-12                    A14 = 0.78185 × 10.sup.-17                                                                          A14 = 0.12445 × 10.sup.-15                    A16 = 0.11566 × 10.sup.-18                                                                          A16 = 0.22007 × 10.sup.-17                    r7:                        r13:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.36494 × 10.sup.-6                                                                          A4 =  -0.60404 × 10.sup.-4                    A6 =  0.10444 × 10.sup.-7                                                                           A6 =  0.78833 × 10.sup.-6                     A8 =  0.46241 × 10.sup.-11                                                                          A8 =  -0.15752 × 10.sup.-7                    A10 = -0.10907 × 10.sup.-12                                                                         A10 = 0.26799 × 10.sup.-9                     A12 = -0.25801 × 10.sup.-15                                                                         A12 = -0.15938 × 10.sup.-11                                              A14 = -0.12835 × 10.sup.-15                                              A16 = -0.23419 × 10.sup.-17                   ______________________________________                                    

                                      TABLE 9A                                     __________________________________________________________________________     Lens Construction of Eighth Embodiment                                         f = 82.0 ˜ 120.0 ˜ 158.0                                           fNo. = 4.6 ˜ 5.2 ˜ 5.7                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________        r1 24.753                                                                               d1   7.000                                                                              N1 1.69100                                                                              ν1                                                                             54.75                                            r2 -170.668                                                                             d2   1.180                                                            r3 -151.154                                                                             d3   1.980                                                                              N2 1.80741                                                                              ν2                                                                             31.59                                            r4 45.704                                                                               d4   5.025 ˜ 13.271 ˜ 18.355                              r5 Flare                                                                          Cutter                                                                               d5   0.860                                                         *  r6 -36.300                                                                              d6   1.000                                                                              N3 1.78831                                                                              ν3                                                                             47.32                                            r7 1509.958                                                                             d7   0.820                                                            r8 Stop                                                                                 d8   3.230                                                            r9 265.691                                                                              d9   3.350                                                                              N4 1.48749                                                                              ν4                                                                             70.44                                            r10                                                                               -16.318                                                                              d10  0.500                                                            r11                                                                               Flare                                                                          Cutter                                                                               d11 17.495 ˜ 5.328 ˜ 1.000                             *  r12                                                                               -82.136                                                                              d12 1.790                                                                               N5 1.79850                                                                              ν5                                                                             22.60                                            r13                                                                               -24.995                                                                              d13 0.940                                                             r14                                                                               -17.066                                                                              d14 0.800                                                                               N6 1.80500                                                                              ν6                                                                             40.97                                         *  r15                                                                               -742.341                                                                 __________________________________________________________________________      Σd = 45.970 ˜ 43.96 ˜ 42.805                           

                  TABLE 9B                                                         ______________________________________                                         Aspherical Coefficient of Eighth Embodiment                                    ______________________________________                                         r6:                        r15:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.39419 × 10.sup.-4                                                                          A4 =  -0.33714 × 10.sup.-4                    A6 =  0.81732 × 10.sup.-7                                                                           A6 =  0.35844 × 10.sup.-6                     A8 =  -0.50904 × 10.sup.-8                                                                          A8 =  -0.80989 × 10.sup.-8                    A10 = 0.63079 × 10.sup.-10                                                                          A10 = 0.13636 × 10.sup.-9                     A12 = -0.32886 × 10.sup.-12                                                                         A12 = -0.78402 × 10.sup.-12                   r12:                                                                           ε =                                                                          0.10000 × 10                                                       A4 =  0.10528 × 10.sup.-4                                                A6 =  0.96880 × 10.sup.-7                                                A8 =  0.20231 × 10.sup.-8                                                A10 = -0.26508 × 10.sup.-10                                              A12 = 0.26108 × 10.sup.-12                                               ______________________________________                                    

                                      TABLE 10A                                    __________________________________________________________________________     Lens Construction of Ninth Embodiment                                          f = 82.0 ˜ 120.0 ˜ 158.0                                           fNo. = 4.6 ˜ 5.2 ˜ 5.7                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________        r1 32.591                                                                               d1   5.877                                                                              N1 1.69100                                                                              ν1                                                                             54.75                                            r2 -161.851                                                                             d2   2.548                                                            r3 -116.617                                                                             d3   1.000                                                                              N2 1.80741                                                                              ν2                                                                             31.59                                            r4 77.552                                                                               d4  15.396 ˜ 31.343 ˜ 37.054                           *  r5 -25.895                                                                              d5   1.000                                                                              N3 1.83400                                                                              ν3                                                                             37.05                                         *  r6 -98.414                                                                              d6   0.568                                                            r7 Stop                                                                                 d7   3.000                                                            r8 -441.560                                                                             d8   3.192                                                                              N4 1.56873                                                                              ν4                                                                             63.10                                            r9 -14.775                                                                              d9  15.129 ˜ 6.361 ˜ 1.000                             *  r10                                                                               -1940.843                                                                            d10  2.212                                                                              N5 1.75450                                                                              ν5                                                                             32.17                                            r11                                                                               -20.511                                                                              d11  0.565                                                            r12                                                                               -15.522                                                                              d12  0.700                                                                              N6 1.80500                                                                              ν6                                                                             51.57                                         *  r13                                                                               71.145                                                                   __________________________________________________________________________     Σd = 51.187 ˜ 58.366 ˜ 58.716                                         Closest Focusing (D = 1.0 m)                                                      d4  12.392 ˜ 26.837 ˜ 31.669                                       d9  18.133 ˜ 10.867 ˜ 6.385                       

                  TABLE 10B                                                        ______________________________________                                         Aspherical Coefficient of Ninth Embodiment                                     ______________________________________                                         r5:                        r10:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.50264 × 10.sup.-4                                                                          A4 =  -0.72467 × 10.sup.-5                    A6 =  -0.88171 × 10.sup.-8                                                                          A6 =  0.66828 × 10.sup.-6                     A8 =  -0.11756 × 10.sup.-7                                                                          A8 =  -0.13765 × 10.sup.-7                    A10 = 0.27112 × 10.sup.-9                                                                           A10 = 0.35385 × 10.sup.-9                     A12 = -0.25465 × 10.sup.-11                                                                         A12 = -0.21767 × 10.sup.-11                   r6:                        r13:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.37396 × 10.sup.-6                                                                          A4 =  -0.37474 × 10.sup.-4                    A6 =  0.64781 × 10.sup.-8                                                                           A6 =  0.52227 × 10.sup.-6                     A8 =  -0.44828 × 10.sup.-11                                                                         A8 =  -0.12204 × 10.sup.-7                    A10 = -0.30118 × 10.sup.-12                                                                         A10 = 0.31183 × 10.sup.-9                     A12 = -0.28385 × 10.sup.-14                                                                         A12 = -0.22332 × 10.sup.-11                   ______________________________________                                    

                                      TABLE 11A                                    __________________________________________________________________________     Lens Construction of Tenth Embodiment                                          f = 82.0 ˜ 120.0 ˜ 158.0                                           fNo. = 4.6 ˜ 5.2 ˜ 5.7                                             Radius of   Axial    Refractive                                                                              Abbe                                             Curvature   Distance Index (Nd)                                                                              Number                                           __________________________________________________________________________     *  r1 32.410                                                                               d1  10.000                                                                              N1 1.62230                                                                              ν1                                                                             53.11                                            r2 -361.920                                                                             d2   6.700                                                            r3 -113.705                                                                             d3   1.440                                                                              N2 1.84666                                                                              ν2                                                                             23.82                                            r4 107.861                                                                              d4   4.544 ˜ 22.677 ˜ 28.662                           *  r5 -30.717                                                                              d5   1.200                                                                              N3 1.80741                                                                              ν3                                                                             31.59                                            r6 -271.463                                                                             d6   4.900                                                            r7 -181.809                                                                             d7   2.670                                                                              N4 1.62280                                                                              ν4                                                                             56.88                                            r8 -15.642                                                                              d8   0.500                                                            r9 Stop                                                                                 d9  15.937 ˜ 6.779 ˜ 1.000                             *  r10                                                                               176.488                                                                              d10  1.970                                                                              N5 1.75000                                                                              ν5                                                                             25.14                                            r11                                                                               -22.454                                                                              d11  0.530                                                            r12                                                                               -17.238                                                                              d12  0.850                                                                              N6 1.85000                                                                              ν6                                                                             40.04                                         *  r13                                                                               62.248                                                                   __________________________________________________________________________      Σd = 51.241 ˜ 60.216 ˜ 60.422                          

                  TABLE 11B                                                        ______________________________________                                         Aspherical Coefficient of Tenth Embodiment                                     ______________________________________                                         r1:                        r10:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  0.69127 × 10.sup.-8                                                                           A4 =  -0.20483 × 10.sup.-4                    A6 =  -0.56365 × 10.sup.-9                                                                          A6 =  0.96091 × 10.sup.-7                     A8 =  0.11704 × 10.sup.-11                                                                          A8 =  0.11560 × 10.sup.-7                     A10 = 0.19276 × 10.sup.-13                                                                          A10 = -0.21519 × 10.sup.-9                    A12 = -0.68161 × 10.sup.-16                                                                         A12 = 0.21269 × 10.sup.-11                    r5:                        r13:                                                ε =                                                                          0.10000 × 10   ε =                                                                          0.10000 × 10                            A4 =  -0.52915 × 10.sup.-4                                                                          A4 =  -0.53625 × 10.sup.-4                    A6 =  0.21093 × 10.sup.-6                                                                           A6 =  0.67444 × 10.sup.-6                     A8 =  -0.16873 × 10.sup.-7                                                                          A8 =  -0.16134 × 10.sup.-7                    A10 = 0.31014 × 10.sup.-9                                                                           A10 = 0.36475 × 10.sup.-9                     A12 = -0.23164 × 10.sup.-11                                                                         A12 = -0.26644 × 10.sup.-11                   ______________________________________                                    

                                      TABLE 12A                                    __________________________________________________________________________     Lens Construction of Eleventh Embodiment                                                    f = 82.0 ˜ 120.0 ˜ 158.0                                           f No. = 4.6 ˜ 5.2 ˜ 5.7                               Radius of                                                                             Axial           Refractive                                                                            Abbe                                             Curvature                                                                             Distance        Index (Nd)                                                                            Number                                           __________________________________________________________________________     r1                                                                               33.480                                                                              d1 4.300        N1 1.74250                                                                            ν1 52.47                                      r2                                                                               -115.645                                                                            d2 0.900                                                                r3                                                                               -121.066                                                                            d3 1.000        N2 1.67741                                                                            ν2 28.50                                      r4                                                                               62.780                                                                              d4 5.454 ˜ 15.322 ˜ 19.941                                  r5                                                                               -28.888                                                                             d5 1.000        N3 1.51009                                                                            ν3 63.43                                      r6                                                                               -116.093                                                                            d6 9.300                                                                r7                                                                               -91.771                                                                             d7 2.000        N4 1.64769                                                                            ν4 31.23                                      r8                                                                               -33.543                                                                             d8 0.500                                                                r9                                                                               Stop                                                                                d9 4.000                                                                r10                                                                              212.542                                                                             d10                                                                               2.630        N5 1.60881                                                                            ν5 58.86                                      r11                                                                              -18.976                                                                             d11                                                                               0.180                                                                r12                                                                              -18.425                                                                             d12                                                                               0.800        N6 1.79504                                                                            ν6 28.39                                      r13                                                                              -39.416                                                                             d13                                                                               16.747 ˜ 6.819 ˜ 1.000                                   r14                                                                              -30.648                                                                             d14                                                                               1.300        N7 1.79850                                                                            ν7 22.60                                      r15                                                                              -19.102                                                                             d15                                                                               0.100                                                                r16                                                                              -19.603                                                                             d16                                                                               0.800        N8 1.75450                                                                            ν8 51.57                                      r17                                                                              355.100                                                                      Σd = 51.011 ˜ 50.951 ˜ 49.751                                __________________________________________________________________________

                                      TABLE 13A                                    __________________________________________________________________________     Lens Construction of Twelfth Embodiment                                        __________________________________________________________________________                  f = 82.0 ˜ 120.0 ˜ 158.0                                           f No. = 4.6 ˜ 5.2 ˜ 5.8                               Radius of                                                                             Axial           Refractive                                                                            Abbe                                             Curvature                                                                             Distance        Index (Nd)                                                                            Number                                           __________________________________________________________________________     r1                                                                               36.656                                                                              d1 5.130        N1 1.70800                                                                            ν1 53.23                                      r2                                                                               -120.408                                                                            d2 0.860                                                                r3                                                                               -132.510                                                                            d3 1.000        N2 1.74000                                                                            ν2 31.72                                      r4                                                                               75.976                                                                              d4 5.429 ˜ 18.174 ˜ 23.493                                  r5                                                                               -34.220                                                                             d5 1.000        N3 1.48749                                                                            ν3 70.44                                      r6                                                                               -73.401                                                                             d6 12.900                                                               r7                                                                               Stop                                                                                d7 5.680                                                                r8                                                                               159.548                                                                             d8 2.580        N4 1.77000                                                                            ν4 48.92                                      r9                                                                               -24.967                                                                             d9 0.900                                                                r10                                                                              -21.289                                                                             d10                                                                               0.950        N5 1.84666                                                                            ν5 24.51                                      r11                                                                              -34.151                                                                             d11                                                                               17.230 ˜ 7.079 ˜ 1.000                                   r12                                                                              -29.184                                                                             d12                                                                               1.480        N6 1.79850                                                                            ν6 22.60                                      r13                                                                              -20.039                                                                             d13                                                                               0.100                                                                r14                                                                              -21.828                                                                             d14                                                                               0.950        N7 1.75450                                                                            ν7 51.57                                      r15                                                                              2732.017                                                                                  Σd = 56.189 ˜ 58.783 ˜ 58.023                   __________________________________________________________________________                  Closest Focusing (D = 1.0 m)                                                    d4  1.988 ˜ 13.405 ˜ 17.865                                       d11  20.671 ˜ 11.848 ˜ 6.628                          __________________________________________________________________________

                                      TABLE 14A                                    __________________________________________________________________________     Lens Construction of Thirteenth Embodiment                                     __________________________________________________________________________                  f = 82.0 ˜ 138.0 ˜ 234.0                                           f No. = 4.6 ˜ 5.2 ˜ 5.7                               Radius of                                                                              Axial           Refractive                                                                           Abbe                                             Curvature                                                                              Distance        Index (Nd)                                                                           Number                                           __________________________________________________________________________     r1 43.926                                                                              d1 12.000       N1 1.63980                                                                           ν1 34.55                                      r2 246.738                                                                             d2 2.000                                                               r3 31.080                                                                              d3 8.850        N2 1.48749                                                                           ν2 70.44                                      r4 278.824                                                                             d4 1.300        N3 1.78472                                                                           ν3 25.70                                      * r5                                                                              29.662                                                                              d5 9.737 ˜ 32.164 ˜ 37.729                                 r6 -27.530                                                                             d6 3.000        N4 1.85000                                                                           ν4 40.04                                      r7 99.569                                                                              d7 0.850                                                               r8 Stop                                                                                d8 0.850                                                               r9 -98.291                                                                             d9 5.500        N5 1.51728                                                                           ν5 69.43                                      r10                                                                               -17.029                                                                             d10                                                                               0.100                                                               r11                                                                               41.613                                                                              d11                                                                               4.000        N6 1.48749                                                                           ν6 70.44                                      r12                                                                               -21.925                                                                             d12                                                                               11.538 ˜ 5.884 ˜ 1.000                                  * r13                                                                             -108.562                                                                            d13                                                                               0.750        N7 1.80500                                                                           ν7 40.97                                      r14                                                                               23.084                                                                              d14                                                                               1.950                                                               r15                                                                               -144.723                                                                            d15                                                                               0.750        N8 1.85000                                                                           ν8 40.04                                      * r16                                                                             34.666                                                                              d16                                                                               0.230                                                               r17                                                                               86.655                                                                              d17                                                                               2.600        N9 1.79850                                                                           ν9 22.60                                      r18                                                                               -30.346                                                                     Σd = 66.005 ˜ 82.778 ˜ 83.459                                __________________________________________________________________________

                  TABLE 14B                                                        ______________________________________                                         Aspherical Coefficient of Thirteenth Embodiment                                ______________________________________                                         r6:                    r16:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    -0.50885 × 10.sup.-4                                                                    A4 =    -0.12509 × 10.sup.-3                      A6 =    -0.33844 × 10.sup.-6                                                                    A6 =    0.74056 × 10.sup.-6                       A8 =    0.59822 × 10.sup.-8                                                                     A8 =    -0.83283 × 10.sup.-8                      A10 =   -0.69159 × 10.sup.-10                                                                   A10 =   0.68124 × 10.sup.-10                      A12 =   0.31293 × 10.sup.-12                                                                    A12 =   -0.30883 × 10.sup.-12                     r13:                                                                           ε =                                                                            0.10000 × 10                                                     A4 =    -0.11983 × 10-3                                                  A6 =    0.83127 × 10.sup.-6                                              A8 =    -0.84355 × 10.sup.-8                                             A10 =   0.70463 × 10.sup.-10                                             A12 =   -0.31428 × 10.sup.-12                                            ______________________________________                                    

                                      TABLE 15A                                    __________________________________________________________________________     Lens Construction of Fourteenth Embodiment                                                  f = 82.0 ˜ 138.0 ˜ 234.0                                           f No. = 4.6 ˜ 5.5 ˜ 5.8                               Radius of                                                                              Axial           Refractive                                                                           Abbe                                             Curvature                                                                              Distance        Index (Nd)                                                                           Number                                           __________________________________________________________________________     r1 41.589                                                                              d1 6.120        N1 1.83400                                                                           ν1 37.05                                      r2 139.887                                                                             d2 1.500                                                               r3 32.987                                                                              d3 8.630        N2 1.48749                                                                           ν2 70.44                                      r4 144.800                                                                             d4 1.300        N3 1.84666                                                                           ν3 23.82                                      r5 31.525                                                                              d5 6.334 ˜ 29.731 ˜ 33.915                                 r6 Stop                                                                                d6 1.700                                                               * r7                                                                              -25.236                                                                             d7 0.900        N4 1.80500                                                                           ν4 40.97                                      r8 84.973                                                                              d8 0.840                                                               r9 Flare                                                                          Cutter                                                                              d9 3.240                                                               r10                                                                               -408.893                                                                            d10                                                                               3.200        N5 1.48749                                                                           ν5 70.44                                      r11                                                                               -16.423                                                                             d11                                                                               0.100                                                               r12                                                                               68.284                                                                              d12                                                                               3.330        N6 1.48749                                                                           ν6 70.44                                      r13                                                                               -20.411                                                                             d13                                                                               0.100                                                               r14                                                                               Stop                                                                                d14                                                                               11.827 ˜ 5.615 ˜ 1.000                                  * r15                                                                             -472.567                                                                            d15                                                                               0.800        N7 1.77250                                                                           ν7 49.77                                      r16                                                                               20.582                                                                              d16                                                                               1.720                                                               r17                                                                               -146.639                                                                            d17                                                                               0.800        N8 1.75450                                                                           ν8 51.57                                      * r18                                                                             32.460                                                                              d18                                                                               0.100                                                               r19                                                                               57.832                                                                              d19                                                                               2.000        N9 1.79850                                                                           ν9 22.60                                      r20                                                                               -59.876                                                                     Σd = 54.541 ˜ 71.726 ˜ 71.295                                __________________________________________________________________________

                  TABLE 15B                                                        ______________________________________                                         Aspherical Coefficient of Fourteenth Embodiment                                ______________________________________                                         r7:                    r18:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    -0.60523 × 10.sup.-4                                                                    A4 =    -0.14838 × 10.sup.-3                      A6 =    -0.39512 × 10.sup.-6                                                                    A6 =    0.70475 × 10.sup.-6                       A8 =    0.59832 × 10.sup.-8                                                                     A8 =    -0.76810 × 10.sup.-8                      A10 =   -0.44617 × 10.sup.-10                                                                   A10 =   0.59949 × 10.sup.-10                      A12 =   0.44350 × 10.sup.-13                                                                    A12 =   -0.39824 × 10.sup.-12                     r15:                                                                           ε =                                                                            0.10000 × 10                                                     A4 =    -0.13498 × 10-3                                                  A6 =    0.79659 × 10.sup.-6                                              A8 =    -0.91736 × 10.sup.-8                                             A10 =   0.89663 × 10.sup.-10                                             A12 =   -0.51932 × 10.sup.-12                                            ______________________________________                                    

                                      TABLE 16A                                    __________________________________________________________________________     Lens Construction of Fifteenth Embodiment                                                   f = 82.0 ˜ 138.0 ˜ 234.0                                           f No. = 4.6 ˜ 5.6 ˜ 5.8                               Radius of                                                                              Axial           Refractive                                                                            Abbe                                            Curvature                                                                              Distance        Index (Nd)                                                                            Number                                          __________________________________________________________________________     r1 36.993                                                                              d1 5.480        N1 1.80500                                                                            ν1 40.97                                     r2 100.363                                                                             d2 6.400                                                               r3 24.493                                                                              d3 7.000        N2 1.48749                                                                            ν2 70.44                                     r4 192.356                                                                             d4 0.100        N3 1.70055                                                                            ν3 30.11                                     r5 177.167                                                                             d5 1.300 ˜ 23.685 ˜ 28.473                                 r6 20.018                                                                              d6 5.535                                                               * r7                                                                              -31.209                                                                             d7 0.900        N4 1.85000                                                                            ν4 40.04                                     r8 101.241                                                                             d8 3.030                                                               r9 -328.159                                                                            d9 4.060        N5 1.48749                                                                            ν5 70.44                                     r10                                                                               -15.566                                                                             d10                                                                               1.950                                                               r11                                                                               44.887                                                                              d11                                                                               3.760        N6 1.48749                                                                            ν6 70.44                                     r12                                                                               -22.013                                                                             d12                                                                               0.100                                                               r13                                                                               Stop                                                                                d13                                                                               9.080 ˜ 4.579 ˜ 1.000                                   * r14                                                                             -34.985                                                                             d14                                                                               0.750        N7 1.85000                                                                            ν7 40.04                                     r15                                                                               27.438                                                                              d15                                                                               2.000                                                               r16                                                                               -40.087                                                                             d16                                                                               0.750        N8 1.80500                                                                            ν8 40.97                                     * r17                                                                             103.884                                                                             d17                                                                               0.100                                                               r18                                                                               95.499                                                                              d18                                                                               2.570        N9 1.79850                                                                            ν9 22.60                                     r19                                                                               -26.962                                                                     Σd = 54.865 ˜ 68.514 ˜ 69.723                                __________________________________________________________________________

                  TABLE 16B                                                        ______________________________________                                         Aspherical Coefficient of Fifteenth Embodiment                                 ______________________________________                                         r7:                    r17:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    -0.61722 × 10.sup.-4                                                                    A4 =    -0.48594 × 10.sup.-4                      A6 =    -0.16007 × 10.sup.-6                                                                    A6 =    0.57978 × 10.sup.-6                       A8 =    0.80476 × 10.sup.-9                                                                     A8 =    -0.14360 × 10.sup.-7                      A10 =   -0.56202 × 10.sup.-11                                                                   A10 =   0.17839 × 10.sup.-9                       A12 =   0.47071 × 10.sup.-14                                                                    A12 =   -0.85458 × 10.sup.-12                     r14:                                                                           ε =                                                                            0.10000 × 10                                                     A4 =    -0.32203 × 10.sup.-4                                             A6 =    0.63012 × 10.sup.-6                                              A8 =    -0.15013 × 10-7                                                  A10 =   0.18658 × 10-9                                                   A12 =   -0.90240 × 10.sup.-12                                            ______________________________________                                    

                                      TABLE 17A                                    __________________________________________________________________________     Lens Construction of Sixteenth Embodiment                                                   f = 82.0 ˜ 138.0 ˜ 234.0                                           f No. = 4.6 ˜ 5.2 ˜ 5.7                               Radius of                                                                              Axial           Refractive                                                                            Abbe                                            Curvature                                                                              Distance        Index (Nd)                                                                            Number                                          __________________________________________________________________________     r1 40.564                                                                              d1 8.850        N1 1.67339                                                                            ν1 29.25                                     r2 421.058                                                                             d2 0.100                                                               r3 34.256                                                                              d3 8.480        N2 1.48749                                                                            ν2 70.44                                     r4 -488.749                                                                            d4 1.300        N3 1.80518                                                                            ν3 25.43                                     r5 29.724                                                                              d5 11.762 ˜ 36.109 ˜ 42.55                                 * r6                                                                              .-38.801                                                                            d6 2.450        N4 1.77551                                                                            ν4 37.90                                     r7 42.307                                                                              d7 1.320                                                               r8 Stop                                                                                d8 1.480                                                               r9 -274.307                                                                            d9 5.250        N5 1.51680                                                                            ν5 64.20                                     r10                                                                               -16.525                                                                             d10                                                                               0.900                                                               r11                                                                               48.360                                                                              d11                                                                               5.130        N6 1.48749                                                                            ν6 70.44                                     r12                                                                               -20.656                                                                             d12                                                                               9.447 ˜ 5.615 ˜ 1.000                                   * r13                                                                             -820.647                                                                            d13                                                                               0.800        N7 1.83400                                                                            ν7 37.05                                     r14                                                                               19.756                                                                              d14                                                                               2.550                                                               r15                                                                               -55.324                                                                             d15                                                                               0.800        N8 1.85000                                                                            ν8 40.04                                     * r16                                                                             35.028                                                                              d16                                                                               0.230                                                               r17                                                                               105.734                                                                             d17                                                                               2.930        N9 1.79850                                                                            ν9 22.60                                     r18                                                                               -24.386                                                                     Σd = 63.779 ˜ 83.791 ˜ 86.21                                 __________________________________________________________________________

                  TABLE 17B                                                        ______________________________________                                         Aspherical Coefficient of Sixteenth Embodiment                                 ______________________________________                                         r6:                    r16:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    -0.65731 × 10.sup.-4                                                                    A4 =    -0.13246 × 10.sup.-3                      A6 =    -0.31441 × 10.sup.-6                                                                    A6 =    0.73791 × 10.sup.-6                       A8 =    0.49324 × 10.sup.-8                                                                     A8 =    -0.94943 × 10.sup.-8                      A10 =   -0.60268 × 10.sup.-10                                                                   A10 =   0.86587 × 10.sup.-10                      A12 =   0.27929 × 10.sup.-12                                                                    A12 =   -0.44144 × 10.sup.-12                     r13:                                                                           ε =                                                                            0.1000 × 10                                                      A4 =    -0.12079 × 10.sup.-3                                             A6 =    0.66521 × 10.sup.-6                                              A8 =    -0.78435 × 10.sup.-8                                             A10 =   0.84146 × 10.sup.-10                                             A12 =   -0.44119 × 10.sup.-12                                            ______________________________________                                    

                                      TABLE 18A                                    __________________________________________________________________________     Lens Construction of Seventeenth Embodiment                                                 f = 82.0 ˜ 120.0 ˜ 158.0                                           f No. = 4.6 ˜ 5.2 ˜ 5.7                               Radius of                                                                              Axial           Refractive                                                                           Abbe                                             Curvature                                                                              Distance        Index (Nd)                                                                           Number                                           __________________________________________________________________________     r1 24.719                                                                              d1 7.000        N1 1.69350                                                                           ν1 51.83                                      r2 -146.346                                                                            d2 1.180                                                               r3 -117.052                                                                            d3 1.980        N2 1.80741                                                                           ν2 31.59                                      r4 45.312                                                                              d4 5.292 ˜ 15.167 ˜ 21.378                                 r5 Stop                                                                                d5 0.860                                                               * r6                                                                              -36.255                                                                             d6 1.000        N3 1.78831                                                                           ν3 47.32                                      r7 -561.520                                                                            d7 0.820                                                               r8 Flare                                                                          Cutter                                                                              d8 3.230                                                               r9 347.472                                                                             d9 3.350        N4 1.48749                                                                           ν4 70.44                                      r10                                                                               -16.332                                                                             d10                                                                               0.500                                                               r11                                                                               Stop                                                                                d11                                                                               17.086 ˜ 7.211 ˜ 1.000                                  * r12                                                                             -85.730                                                                             d12                                                                               1.790        N5 1.79850                                                                           ν5 22.60                                      r13                                                                               -27.436                                                                             d13                                                                               0.940                                                               r14                                                                               -17.016                                                                             d14                                                                               0.800        N6 1.80500                                                                           ν6 40.97                                      * r15                                                                             -259.281                                                                    Σd = 45.828 ˜ 45.828 ˜ 45.828                                __________________________________________________________________________

                  TABLE 18B                                                        ______________________________________                                         Aspherical Coefficient of Seventeenth Embodiment                               ______________________________________                                         r6:                    r15:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    -0.38332 × 10.sup.-4                                                                    A4 =    -0.34091 × 10.sup.-4                      A6 =    0.78074 × 10.sup.-7                                                                     A6 =    0.35339 × 10.sup.-6                       A8 =    -0.50818 × 10.sup.-8                                                                    A8 =    -0.81651 × 10.sup.-8                      A10 =   0.63173 × 10.sup.-10                                                                    A10 =   0.13540 × 10.sup.-9                       A12 =   -0.32902 × 10.sup.-12                                                                   A12 =   -0.80298 × 10.sup.-12                     r12:                                                                           ε =                                                                            0.10000 × 10                                                     A4 =    -0.97551 × 10-5                                                  A6 =    0.10049 × 10.sup.-6                                              A8 =    0.20604 × 10.sup.-8                                              A10 =   -0.26332 × 10.sup.-10                                            A12 =   0.25959 × 10.sup.-12                                             ______________________________________                                    

                                      TABLE 19A                                    __________________________________________________________________________     Lens Construction of Eighteenth Embodiment                                                  f = 82.0 ˜ 120.0 ˜ 158.0                                           f No. = 4.6 ˜ 5.2 ˜ 5.7                               Radius of                                                                              Axial           Refractive                                                                           Abbe                                             Curvature                                                                              Distance        Index (Nd)                                                                           Number                                           __________________________________________________________________________     r1 39.782                                                                              d1 4.900        N1 1.69680                                                                           ν1 56.47                                      r2 -126.443                                                                            d2 0.900                                                               r3 -198.873                                                                            d3 1.000        N2 1.75000                                                                           ν2 25.14                                      r4 110.252                                                                             d4 7.759 ˜ 17.235 ˜ 21.169                                 r5 Stop                                                                                d5 2.000                                                               r6 -21.416                                                                             d6 1.000        N3 1.51680                                                                           ν3 64.20                                      r7 -99.032                                                                             d7 6.500                                                               r8 -49.900                                                                             d8 2.400        N4 1.67339                                                                           ν4 29.25                                      r9 -22.506                                                                             d9 5.952                                                               r10                                                                               90.180                                                                              d10                                                                               4.100        N5 1.60881                                                                           ν5 58.86                                      r11                                                                               -16.198                                                                             d11                                                                               0.810        N6 1.75520                                                                           ν6 27.51                                      r12                                                                               -52.137                                                                             d12                                                                               16.591 ˜ 6.647 ˜ 1.000                                  r13                                                                               -42.194                                                                             d13                                                                               1.800        N7 1.79850                                                                           ν7 22.60                                      r14                                                                               -22.114                                                                             d14                                                                               0.210                                                               r15                                                                               -22.305                                                                             d15                                                                               0.800        N8 1.75450                                                                           ν8 51.57                                      r16                                                                               93.408                                                                      Σd = 56.722 ˜ 56.254 ˜ 54.541                                __________________________________________________________________________

                                      TABLE 20A                                    __________________________________________________________________________     Lens Construction of Nineteenth Embodiment                                     __________________________________________________________________________                  f = 82.0 ˜ 120.0 ˜ 158.0                                           f No. = 4.6 ˜ 5.2 ˜ 5.7                               Radius of                                                                              Axial           Refractive                                                                           Abbe                                             Curvature                                                                              Distance        Index (Nd)                                                                           Number                                           __________________________________________________________________________     r1 29.774                                                                              d1 4.900        N1 1.69100                                                                           ν1 54.75                                      r2 -734.214                                                                            d2 0.900                                                               r3 1135.048                                                                            d3 1.000        N2 1.80518                                                                           ν2 25.43                                      r4 61.587                                                                              d4 5.128 ˜ 16.319 ˜ 21.887                                 r5 Stop                                                                                d5 2.000                                                               r6 -19.512                                                                             d6 1.000        N3 1.48749                                                                           ν3 70.44                                      r7 -99.455                                                                             d7 2.500                                                               r8 -26.840                                                                             d8 2.400        N4 1.67339                                                                           ν4 29.25                                      r9 -18.643                                                                             d9 4.500                                                               r10                                                                               67.466                                                                              d10                                                                               4.100        N5 1.51728                                                                           ν5 69.43                                      r11                                                                               -20.737                                                                             d11                                                                               0.810        N6 1.75000                                                                           ν6 25.14                                      * r12                                                                             -36.181                                                                             d12                                                                               18.936 ˜ 7.745 ˜ 1.000                                  * r13                                                                             -28.411                                                                             d13                                                                               1.800        N7 1.83350                                                                           ν7 21.00                                      r14                                                                               -20.858                                                                             d14                                                                               0.400                                                               r15                                                                               -19.368                                                                             d15                                                                               0.800        N8 1.75450                                                                           ν8 51.57                                      * r16                                                                             -136.490                                                                    Σd = 51.174 ˜ 51.174 ˜ 49.997                                __________________________________________________________________________                  Closest Focusing (D = 1.0 m)                                                    d4  1.215 ˜ 10.872 ˜ 15.247                                       d12  22.849 ˜ 13.192 ˜ 7.640                          __________________________________________________________________________

                  TABLE 20B                                                        ______________________________________                                         Aspherical Coefficient of Nineteenth Embodiment                                ______________________________________                                         r12:                   r16:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    0.41519 × 10-5                                                                          A4 =    -0.32367 × 10.sup.-5                      A6 =    -0.19986 × 10.sup.-8                                                                    A6 =    -0.19044 × 10.sup.-7                      A8 =    -0.27913 × 10.sup.-10                                                                   A8 =    0.14468 × 10.sup.-9                       A10 =   -0.11359 × 10.sup.-12                                                                   A10 =   0.45260 × 10.sup.-11                      A12 =   0.14355 × 10.sup.-14                                                                    A12 =   -0.42698 × 10.sup.-13                     r13:                                                                           ε =                                                                            0.10000 × 10                                                     A4 =    0.22402 × 10.sup.-5                                              A6 =    0.14821 × 10.sup.-7                                              A8 =    0.12811 × 10.sup.-10                                             A10 =   -0.26781 × 10.sup.-13                                            A12 =   -0.20030 × 10.sup.-14                                            ______________________________________                                    

                                      TABLE 21A                                    __________________________________________________________________________     Lens Construction of Twentieth Embodiment                                      __________________________________________________________________________                  f = 82.0 ˜ 120.0 ˜ 158.0                                           f No. = 4.4 ˜ 5.2 ˜ 5.7                               Radius of                                                                             Axial            Refractive                                                                           Abbe                                             Curvature                                                                             Distance         Index (Nd)                                                                           Number                                           __________________________________________________________________________     r1 27.016                                                                              d1 6.000        N1 1.69350                                                                           ν1 50.29                                      r2 -162.243                                                                            d2 1.000                                                               r3 -161.398                                                                            d3 1.500        N2 1.80518                                                                           ν2 25.43                                      r4 64.048                                                                              d4 5.210 ˜ 13.997 ˜ 18.310                                 r5 Stop                                                                                d5 1.500                                                               * r6                                                                              -111.894                                                                            d6 0.956        N3 1.51728                                                                           ν3 69.43                                      r7 27.712                                                                              d7 0.481                                                               r8 26.428                                                                              d8 0.999        N4 1.67339                                                                           ν4 29.25                                      r9 36.197                                                                              d9 4.600                                                               r10                                                                               112.883                                                                             d10                                                                               0.664        N5 1.75000                                                                           ν5 25.14                                      r11                                                                               43.862                                                                              d11                                                                               4.500        N6 1.51728                                                                           ν6 69.43                                      r12                                                                               -18.004                                                                             d12                                                                               0.000                                                               r13                                                                               Flare                                                                          Cutter                                                                              d13                                                                               12.899 ˜ 5.428 ˜ 1.000                                  r14                                                                               -103.181                                                                            d14                                                                               1.000        N7 1.75450                                                                           ν7 51.57                                      r15                                                                               44.391                                                                              d15                                                                               1.699                                                               * r16                                                                             272.257                                                                             d16                                                                               2.100        N8 1.67339                                                                           ν8 29.25                                      r17                                                                               -19.223                                                                             d17                                                                               0.520                                                               r18                                                                               -15.051                                                                             d18                                                                               0.900        N9 1.78831                                                                           ν9 47.32                                      * r19                                                                             -99.766                                                                     Σd = 46.528 ˜ 47.844 ˜ 47.729                                __________________________________________________________________________                  Closest Focusing (D = 1.0 m)                                                    d4  1.432 ˜ 8.923 ˜ 12.275                                        d13  16.677 ˜ 10.501 ˜ 7.035                          __________________________________________________________________________

                  TABLE 21B                                                        ______________________________________                                         Aspherical Coefficient of Nineteenth Embodiment                                ______________________________________                                         r6:                    r19:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    -0.51682 × 10.sup.-4                                                                    A4 =    -0.49756 × 10.sup.-4                      A6 =    0.21032 × 10.sup.-6                                                                     A6 =    0.64250 × 10.sup.-6                       A8 =    -0.95868 × 10.sup.-8                                                                    A8 =    -0 16276 × 10.sup.-7                      Ai0 =   0.14680 × 10.sup.-9                                                                     A10 =   0.26982 × 10.sup.-9                       A12 =   0.16682 × 10.sup.-12                                                                    A12 =   -0.15553 × 10.sup.-11                     A14 =   -0.95748 × 10.sup.-15                                                                   A14 =   0.17043 × 10.sup.-15                      A16 =   0.13103 × 10.sup.-16                                                                    A16 =   -0.31331 × 10.sup.-17                     r16:                                                                           ε =                                                                            0.10000 × 10                                                     A4 =    -0.32114 × 10.sup.-4                                             A6 =    0.19507 × 10.sup.-6                                              A8 =    0.41842 × 10.sup.-8                                              A10 =   -0.75382 × 10.sup.-10                                            A12 =   0.79392 × 10.sup.-12                                             A14 =   -0.58510 × 10.sup.-15                                            A16 =   0.20482 × 10.sup.-17                                             ______________________________________                                    

                                      TABLE 22A                                    __________________________________________________________________________     Lens Construction of Twenty-first Embodiment                                                f = 82.0 ˜ 120.0 ˜ 195.0                                           f No. = 4.6 ˜ 5.2 ˜ 5.7                               Radius of                                                                             Axial            Refractive                                                                           Abbe                                             Curvature                                                                             Distance         Index (Nd)                                                                           Number                                           __________________________________________________________________________     r1 37.487                                                                              cl1                                                                               5.865        N1 1.69350                                                                           ν1 50.29                                      r2                                                                             176.281                                                                                d2 0.892                                                               r3 -195.347                                                                            d3 1.500        N2 1.80518                                                                           ν2 25.43                                      d4 102.078                                                                             d4 4.305 ˜ 18.609 ˜ 27.073                                 r5 Stop                                                                                d5 1.500                                                               * r6                                                                              -213.618                                                                            d6 0.956        N3 1.48749                                                                           ν3 70.44                                      r7 33.905                                                                              d7 0.458                                                               r8 22.311                                                                              d8 1.300        N4 1.67339                                                                           ν4 29.25                                      r9 27.186                                                                              d9 4.406                                                               r10                                                                               126.750                                                                             d10                                                                               0.664        N5 1.68300                                                                           ν5 31.52                                      r11                                                                               30.344                                                                              d11                                                                               5.794        N6 1.51728                                                                           ν6 69.43                                      r12                                                                               -19.071                                                                             d12                                                                               0.000                                                               r13                                                                               Flare                                                                          Cutter                                                                              d13                                                                               15.081 ˜ 7.865 ˜ 1.000                                  r14                                                                               124.678                                                                             d14                                                                               0.966        N7 1.80750                                                                           ν7 35.43                                      r15                                                                               19.012                                                                              d15                                                                               1.979                                                               * r16                                                                             34.987                                                                              d16                                                                               2.700        N8 1.75690                                                                           ν8 29.69                                      r17                                                                               -21.241                                                                             d17                                                                               0.959                                                               r18                                                                               -15.594                                                                             d18                                                                               0.900        N9 1.78831                                                                           ν9 47.32                                      * r19                                                                             212.741                                                                     Σd = 50.225 ˜ 57.313 ˜ 58.912                                __________________________________________________________________________

                  TABLE 22B                                                        ______________________________________                                         Aspherical Coefficient of Twenty-first Embodiment                              ______________________________________                                         r6:                    r19:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    -0.46993 × 10.sup.-4                                                                    A4 =    -0.69557 × 10.sup.-4                      A6 =    0.26232 × 10.sup.-6                                                                     A =6    0.53709 × 10.sup.-6                       A8 =    -0.10280 × 10.sup.-7                                                                    A8 =    -0.16549 × 10.sup.-7                      A10 =   0.14261 × 10.sup.-9                                                                     A10 =   0.27094 × 10.sup.-9                       A12 =   -0.88700 × 10.sup.-12                                                                   A12 =   -0.15055 × 10.sup.-11                     A14 =   0.10842 × 10.sup.-14                                                                    A14 =   0.52740 × 10.sup.-15                      A16 =   0.65934 × 10.sup.-17                                                                    A16 =   -0.23824 × 10.sup.-16                     r16:                                                                           ε =                                                                            0.10000 × 10                                                     A4 =    -0.26837 × 10-4                                                  A6 =    0.81262 × 10.sup.-7                                              A8 =    0.33315 × 10.sup.-8                                              A10 =   -0.79489 × 10.sup.-10                                            A12 =   0.77630 × 10.sup.-12                                             A14 =   -0.74657 × 10.sup.-15                                            A16 =   -0.97514 × 10.sup.-18                                            ______________________________________                                    

                                      TABLE 23A                                    __________________________________________________________________________     Lens Construction of Twenty-second Embodiment                                  __________________________________________________________________________                  f = 153.7 ˜ 225.0 ˜ 296.2                                          f No. = 4.6 ˜ 5.2 ˜ 5.7                               Radius of                                                                              Axial           Refractive                                                                           Abbe                                             Curvature                                                                              Distance        Index (Nd)                                                                           Number                                           __________________________________________________________________________     r1 46.686                                                                              d1 11.100       N1 1.75450                                                                           ν1 51.57                                      r2 -345.999                                                                            d2 3.200                                                               r3 -233.734                                                                            d3 2.500        N2 1.84666                                                                           ν2 23.82                                      r4 130.104                                                                             d4 16.776 ˜ 22.304 ˜ 25.867                                r5 Stop                                                                                d5 2.810                                                               * r6                                                                              -3000.030                                                                           d6 1.500        N3 1.48749                                                                           ν3 70.44                                      r7 74.051                                                                              d7 0.100                                                               r8 33.273                                                                              d8 3.790        N4 1.59270                                                                           ν4 35.45                                      r9 36.365                                                                              d9 4.360                                                               r10                                                                               -4379.242                                                                           d10                                                                               1.650        N5 1.84666                                                                           ν5 23.82                                      r11                                                                               71.395                                                                              d11                                                                               9.900        N6 1.58144                                                                           ν6 40.89                                      r12                                                                               -35.758                                                                             d12                                                                               4.994                                                               r13                                                                               Flare                                                                          Cutter                                                                              d13                                                                               14.403 ˜ 6.548 ˜ 1.875                                  r14                                                                               -72.870                                                                             d14                                                                               1.500        N7 1.87800                                                                           ν7 38.14                                      r15                                                                               20.034                                                                              d15                                                                               0.130                                                               * r16                                                                             20.584                                                                              d16                                                                               10.600       N8 1.67339                                                                           ν8 29.25                                      r17                                                                               -17.570                                                                             d17                                                                               0.260                                                               r18                                                                               -16.447                                                                             d18                                                                               1.500        N9 1.87800                                                                           ν9 38.14                                      * r19                                                                             -100.155                                                                    Σd = 91.073 ˜ 88.746 ˜ 87.636                                __________________________________________________________________________

                  TABLE 23B                                                        ______________________________________                                         Aspherical Coefficient of Twenty-second Embodiment                             ______________________________________                                         r6:                    r19:                                                    ε =                                                                            0.10000 × 10                                                                            ε =                                                                            0.10000 × 10                              A4 =    -0.88605 × 10.sup.-5                                                                    A4 =    -0.99933 × 10.sup.-5                      A6 =    0.59406 × 10.sup.-8                                                                     A6 =    0.12268 × 10.sup.-7                       A8 =    -0.10728 × 10.sup.-9                                                                    A8 =    -0.27224 × 10.sup.-9                      A10 =   0.52575 × 10.sup.-12                                                                    A10 =   0.34258 × 10.sup.-11                      A12 =   -0.90447 × 10.sup.-15                                                                   A12 =   0.13922 × 10.sup.-13                      A14 =   -0.28885 × 10.sup.-18                                                                   A14 =   -0.18280 × 10.sup.-15                     A16 =   0.53635 × 10 .sup.-21                                                                   A16 =   -0.28732 × 10.sup.-17                     r16:                                                                           ε =                                                                            0.10000 × 10                                                     A4 =    -0.84751 × 10.sup.-6                                             A6 =    -0.10095 × 10.sup.-7                                             A8 =    0.80736 × 10.sup.-9                                              A10 =   -0.15887 × 10.sup.-12                                            A12 =   -0.65737 × 10.sup.-13                                            A14 =   -0.39966 × 10.sup.-15                                            A16 =   0.98706 × 10.sup.-17                                             ______________________________________                                    

In Embodiments 1 through 4, the first lens unit comprises a negative meniscus lens having a concave surface on the object side and a positive lens having convex surfaces on both sides, the second lens unit comprises a negative meniscus lens having a concave surface on the image side and a positive meniscus lens having a convex surface on the image side, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative meniscus lens having a concave surface on the object side.

In Embodiment 5, the first lens unit comprises a negative lens having concave surfaces on both sides and a positive lens having convex surfaces on both sides, the second lens unit comprises a negative meniscus lens having a concave surface on the image side and a positive meniscus lens having a convex surface on the image side, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative meniscus lens having a concave surface on the object side.

In Embodiments 6 and 7, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative lens having concave surfaces on both sides and a positive lens having convex surfaces on both sides, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative lens having concave surfaces on both sides.

In Embodiment 8, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative lens having concave surfaces on both sides and a positive lens having convex surfaces on both sides, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative meniscus lens having a concave surface on the object side.

In Embodiments 9 and 10, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative meniscus lens having a concave surface on the object side and a positive meniscus lens having a convex surface on the image side, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative lens having concave surfaces on both sides. Focusing is performed using the second lens unit.

In Embodiment 11, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative meniscus lens having a concave surface on the object side, a positive meniscus lens having a convex surface on the image side, a positive lens having convex surfaces on both sides and a negative meniscus lens having a concave surface on the object side, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative lens having concave surfaces on both sides.

In Embodiment 12, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative meniscus lens having a concave surface on the object side, a positive lens having convex surfaces on both sides and a negative meniscus lens having a concave surface on the object side, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative lens having concave surfaces on both sides. Focusing is performed using the second lens unit.

In Embodiment 13, the first lens unit comprises a positive meniscus lens having a convex surface on the object side and a combination lens comprising a positive meniscus lens having a convex surface on the object side and a negative meniscus lens having a concave surface on the image side, the second lens unit comprises a negative lens having concave surfaces on both sides, a positive meniscus lens having a convex surface on the image side and a positive lens having convex surfaces on both sides, and the third lens unit comprises a negative lens having concave surfaces on both sides, a negative lens having concave surfaces on both sides and a positive lens having convex surfaces on both sides.

In Embodiment 14, the first lens unit comprises a positive meniscus lens having a convex surface on the object side and a combination lens comprising a positive meniscus lens having a convex surface on the object side and a negative meniscus lens having a concave surface on the image side, the second lens unit comprises a negative lens having concave surfaces on both sides, a positive meniscus lens having a convex surface on the image side and a positive lens having convex surfaces on both sides, and the third lens unit comprises a negative lens having concave surfaces on both sides, a negative lens having concave surfaces on both sides and a positive lens having convex surfaces on both sides.

In Embodiment 15, the first lens unit comprises a positive meniscus lens having a convex surface on the object side, a positive meniscus lens having a convex surface on the object side and a negative meniscus lens having a concave surface on the image side, the second lens unit comprises a negative lens having concave surfaces on both sides, a positive meniscus lens having a convex surface on the image side and a positive lens having convex surfaces on both sides, and the third lens unit comprises a negative lens having concave surfaces on both sides, a negative lens having concave surfaces on both sides and a positive lens having convex surfaces on both sides.

In Embodiment 16, the first lens unit comprises a positive meniscus lens having a convex surface on the object side and a combination lens comprising a positive meniscus lens having a convex surface on the object side and a negative meniscus lens having a concave surface on the image side, the second lens unit comprises a negative lens having concave surfaces on both sides, a positive meniscus lens having a convex surface on the image side and a positive lens having convex surfaces on both sides, and the third lens unit comprises a negative lens having concave surfaces on both sides, a negative lens having concave surfaces on both sides and a positive lens having convex surfaces on both sides.

In Embodiment 17, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative meniscus lens having a concave surface on the image side and a positive lens having convex surfaces on both sides, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a positive lens having a convex surface on the object side. During zooming, the first and third lens units move together.

In Embodiment 18, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative meniscus lens having a concave surface on the object side, a positive meniscus lens having a convex surface on the image side and a combination lens comprising a positive lens having convex surfaces on both sides and a negative meniscus lens having a concave surface on the object side, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative lens having concave surfaces on both sides.

In Embodiment 19, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative meniscus lens having concave surface on the image side, the second lens unit comprises a negative meniscus lens having a concave surface on the object side, a positive meniscus lens having a convex surface on the image side and a combination lens comprising a positive lens having convex surfaces on both sides and a negative meniscus lens having a concave surface on the object side, and the third lens unit comprises a positive meniscus lens having a convex surface on the image side and a negative meniscus lens having a concave surface on the object side.

In Embodiment 20, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative lens having concave surfaces on both sides, a positive meniscus lens having a convex surface on the object side and a combination lens comprising a negative meniscus lens having a concave surface on the image side and a positive lens having convex surfaces on both sides, and the third lens unit comprises a negative lens having concave surfaces on both sides, a positive lens having convex surfaces on both sides and a negative meniscus lens having a concave surface on the object side.

In Embodiment 21, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative lens having concave surfaces on both sides, a positive meniscus lens having a convex surface on the object side and a combination lens comprising a negative meniscus lens having a concave surface on the image side and a positive lens having convex surfaces on both sides, and the third lens unit comprises a negative meniscus lens having a concave surface on the image side, a positive lens having convex surfaces on both sides and a negative meniscus lens having a concave surface on the object side.

In Embodiment 22, the first lens unit comprises a positive lens having convex surfaces on both sides and a negative lens having concave surfaces on both sides, the second lens unit comprises a negative lens having concave surfaces on both sides, a positive meniscus lens having a convex surface on the object side and a combination lens comprising a negative lens having concave surfaces on both sides and a negative lens having concave surfaces on both sides, and the third lens unit comprises a negative lens having concave surfaces on both sides, a positive lens having convex surfaces on both sides and a negative meniscus lens having a concave surface on the object side.

In all of the embodiments, the aperture is positioned on the object side or the image side of the second lens unit, or within the second lens unit. It moves together with the second lens unit or independently of the second lens unit during zooming. Focusing is performed using the second lens unit.

The relationships between the embodiments and the conditions are shown in the tables 24 and 25 below.

                  TABLE 24                                                         ______________________________________                                         Condition (1)       (2)    (3)     (4)  (5)                                    ______________________________________                                         Lower Limit                                                                              21.6      1.5    0.5     0.1  0.1                                    Upper Limit                                                                              --        20     30      10   5.0                                    Emb. 1    35.5      3.34   1.34    1.58 0.76                                   Emb. 2    36.5      3.31   1.34    1.58 0.74                                   Emb. 3    35.4      3.34   1.34    1.58 0.76                                   Emb. 4    35.5      3.34   1.34    1.58 0.76                                   Emb. 5    36.0      3.33   1.34    1.62 0.75                                   Emb. 6    29.6      9.49   0.85    1.24 0.52                                   Emb. 7    29.6      9.05   0.85    1.19 0.53                                   Emb. 8    29.0      3.92   0.97    1.12 0.60                                   Emb. 9    29.5      15.40  1.18    1.88 0.57                                   Emb. 10   29.0      30.3   1.29    2.08 0.60                                   Emb. 11   29.1      5.45   0.92    1.14 0.57                                   Emb. 12   29.3      5.43   1.12    1.56 0.59                                   Emb. 13   29.1      9.74   1.48    4.41 0.46                                   Emb. 14   28.7      7.30   1.19    3.35 0.44                                   Emb. 15   29.0      5.03   1.42    4.70 0.41                                   Emb. 16   31.1      11.67  1.56    5.26 0.41                                   Emb. 17   29.0      4.10   1.03    1.28 0.59                                   Emb. 18   27.6      9.76   0.94    1.20 0.59                                   Emb. 19   29.8      7.13   0.94    1.09 0.59                                   Emb. 20   28.1      6.71   0.85    1.23 0.51                                   Emb. 21   27.6      5.80   1.08    1.64 0.51                                   Emb. 22   28.8      2.85   0.67    0.87 0.49                                   ______________________________________                                    

                  TABLE 25                                                         ______________________________________                                                   (6)  (7)        (8)    (9)                                           ______________________________________                                         Lower Limit 1.6    0.1        -5.0 6                                           Upper Limit 3.0    5.0        -0.01                                                                               12                                          Emb. 1      1.633  -0.45      2.57 7.971                                       Emb. 2      1.678  -2.17      2.66 7.971                                       Emb. 3      1.634  -0.42      2.60 7.971                                       Emb. 4      1.634  -0.45      2.57 7.971                                       Emb. 5      1.649  -0.19      2.44 7.830                                       Emb. 6      1.912  2.43       -1.19                                                                               8.420                                       Emb. 7      1.885  2.43       -1.19                                                                               8.420                                       Emb. 8      1.667  2.29       -2.00                                                                               10.160                                      Emb. 9      1.747  1.74       -2.64                                                                               9.425                                       Emb. 10     1.676  1.57       -2.15                                                                               18.140                                      Emb. 11     1.748  1.82       -1.45                                                                               6.200                                       Emb. 42     1.683  1.58       -1.17                                                                               6.990                                       Emb. 13     2.193  1.19       -2.53                                                                               24.150                                      Emb. 14     2.291  1.64       -2.62                                                                               17.550                                      Emb. 15     2.423  1.78       -2.23                                                                               20.280                                      Emb. 16     2.440  1.36       -1.64                                                                               18.730                                      Emb. 17     1.690  2.30       -1.78                                                                               10.160                                      Emb. 18     1.705  1.44       -1.98                                                                               6.800                                       Emb. 19     1.705  1.90       -2.05                                                                               6.800                                       Emb. 20     1.966  2.10       -0.38                                                                               8.500                                       Emb. 21     1.952  1.52       -0.19                                                                               8.257                                       Emb. 22     2.048  2.48       -0.02                                                                               16.800                                      ______________________________________                                    

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. 

What is claimed is:
 1. A zoom lens system comprising from an object side to an image side:a first lens unit of a positive refractive power; a second lens unit of a positive refractive power, wherein a first area of empty space provided between the first and second lens unit is variable during a zooming operation; and a third lens unit of a negative refractive power, wherein a second area of empty space provided between the second and third lens unit is variable during the zooming operation; wherein the zoom lens system fulfills the following condition:

    BFL.sub.W >DL/2

wherein BFL_(W) represents a back focal length of the zoom lens system in the shortest focal length condition, and DL represents a diagonal length of an image frame.
 2. A zoom lens system as claimed in claim 1, wherein the first lens unit has a convex surface toward the object side that is closest to the object.
 3. A zoom lens system as claimed in claim 2, wherein the zoom lens system fulfills the following condition:

    0.1<φ.sub.1-1 /φ.sub.W <5.0

wherein φ₁₋₁ represents a refractive power of the convex surface of the first lens unit that is closest to the object, and φ_(W) represents a refractive power of the zoom lens system in the shortest focal length condition.
 4. A zoom lens system as claimed in claim 1, wherein the second lens unit has a concave surface toward the object side that is closest to the object.
 5. A zoom lens system as claimed in claim 4, wherein the zoom lens system fulfills the following condition:

    -5.0<φ.sub.2-1 /φ.sub.W <-0.01

wherein φ₂₋₁ represents a refractive power of the convex surface of the second lens unit that is closest to the object, and φ_(W) represents a refractive power of the zoom lens system in the shortest focal length condition.
 6. A zoom lens system as claimed in claim 1, wherein the zoom lens system fulfills the following condition:

    0.1<f.sub.1 /f.sub.2 <10

wherein f₁ represents a focal length of the first lens unit, and f₂ represents a focal length of the second lens unit.
 7. A zoom lens system as claimed in claim 1, wherein the zoom lens system fulfills the following condition:

    1.6<β.sub.3W <3.0

wherein β_(3W) represents a lateral magnification of the third lens unit in the shortest focal length condition.
 8. A zoom lens system as claimed in claim 1, wherein the first and third lens units are moved in a body during the zooming operation.
 9. A zoom lens system as claimed in claim 1, wherein the zoom lens system fulfills the following condition:

    0.5<f.sub.1 /f.sub.W <3.0

wherein f₁ represents a focal length of the first lens unit, and f_(W) represents a focal length of the zoom lens system in the shortest focal length condition.
 10. A zoom lens system as claimed in claim 1, wherein the zoom lens system fulfills the following condition:

    6<T.sub.1 <12

wherein T₁ represents an axial distance of the first lens unit.
 11. A zoom lens system as claimed in claim 1, wherein the second lens unit is moved along an optical axis of the zoom lens system in order to execute a focusing operation.
 12. A zoom lens system as claimed in claim 1, wherein the zoom lens system has at least one aspherical surface.
 13. A zoom lens system as claimed in claim 1, wherein the zoom lens system further comprises a diaphragm aperture which is moved with the second lens unit in a body during the zooming operation.
 14. A zoom lens system as claimed in claim 13, wherein the zoom lens system fulfills the following condition:

    1.5<E.sub.12W /E.sub.23T <20

wherein E_(12W) represents a distance of the first area of empty space in the shortest focal length condition, and E_(23T) represents a distance of the second area of empty space in the longest focal length condition.
 15. A zoom lens system comprising from an object side to an image side:a first lens unit of a positive refractive power; a second lens unit of a positive refractive power,wherein a first area of empty space provided between the first and second lens unit is variable during a zooming operation; and a third lens unit of a negative refractive power, wherein a second area of empty space provided between the second and third lens unit is variable during the zooming operation; wherein the zoom lens system fulfills the following condition:

    6<E.sub.12W /E.sub.23T <20

wherein E_(12W) represents a distance of the first area of empty space in the shortest focal length condition, and E_(23T) represents a distance of the second area of empty space in the longest focal length condition.
 16. A zoom lens system as claimed in claim 15, wherein the zoom lens system fulfills the following condition:

    BFL.sub.W >DL/2

wherein BFL_(W) represents a back focal length of the zoom lens system in the shortest focal length condition, and DL represents a diagonal length of an image frame.
 17. A zoom lens system comprising from an object side to an image side:a positive first lens unit consisting of two lens elements; a positive second lens unit consisting of two lens elements, wherein a first area of empty space provided between the first and second lens unit is variable during a zooming operation; and a negative third lens unit consisting of two lens elements, wherein a second area of empty space provided between the second and third lens unit is variable during the zooming operation wherein the zoom lens system fulfills the following condition:

    BFLw>DL /2

wherein BFLw represents a back focal length of the zoom lens system in the shortest focal length condition, and DL represents a diagonal length of an image frame.
 18. A zoom lens system as claimed in claim 17, wherein the zoom lens system has at least three aspherical surfaces.
 19. A zoom lens system as claimed in claim 18, wherein the second and third lens unit have aspherical surfaces. 